X-Git-Url: http://git.kpe.io/?p=ctsim.git;a=blobdiff_plain;f=libctsim%2Fscanner.cpp;h=2314595219d76c45801d1a8dbf8a57f91de10f05;hp=ef72c5b4cc99a7672a9d3ba2a25eac03a8d26edf;hb=c953cbb6ffc2fd50e736230f4e6976a025983cff;hpb=a05f3cb550877e94aa118cc04b361c0c8fdb3dc3 diff --git a/libctsim/scanner.cpp b/libctsim/scanner.cpp index ef72c5b..2314595 100644 --- a/libctsim/scanner.cpp +++ b/libctsim/scanner.cpp @@ -7,9 +7,9 @@ ** Date Started: 1984 ** ** This is part of the CTSim program -** Copyright (C) 1983-2000 Kevin Rosenberg +** Copyright (c) 1983-2001 Kevin Rosenberg ** -** $Id: scanner.cpp,v 1.13 2000/08/31 08:38:58 kevin Exp $ +** $Id: scanner.cpp,v 1.33 2001/03/01 07:30:49 kevin Exp $ ** ** This program is free software; you can redistribute it and/or modify ** it under the terms of the GNU General Public License (version 2) as @@ -71,21 +71,22 @@ DetectorArray::~DetectorArray (void) /* NAME - * Scanner::Scanner Construct a user specified detector structure - * - * SYNOPSIS - * Scanner (phm, nDet, nView, nSample) - * Phantom& phm PHANTOM that we are making detector for - * int geomety Geometry of detector - * int nDet Number of detector along detector array - * int nView Number of rotated views - * int nSample Number of rays per detector - */ - -Scanner::Scanner (const Phantom& phm, const char* const geometryName, int nDet, int nView, int nSample, const double rot_anglen, const double dFocalLengthRatio, const double dFieldOfViewRatio) -{ - m_phmLen = phm.maxAxisLength(); // maximal length along an axis +* Scanner::Scanner Construct a user specified detector structure +* +* SYNOPSIS +* Scanner (phm, nDet, nView, nSample) +* Phantom& phm PHANTOM that we are making detector for +* int geomety Geometry of detector +* int nDet Number of detector along detector array +* int nView Number of rotated views +* int nSample Number of rays per detector +*/ +Scanner::Scanner (const Phantom& phm, const char* const geometryName, + int nDet, int nView, int nSample, const double rot_anglen, + const double dFocalLengthRatio, const double dCenterDetectorRatio, + const double dViewRatio, const double dScanRatio) +{ m_fail = false; m_idGeometry = convertGeometryNameToID (geometryName); if (m_idGeometry == GEOMETRY_INVALID) { @@ -94,95 +95,113 @@ Scanner::Scanner (const Phantom& phm, const char* const geometryName, int nDet, m_failMessage += geometryName; return; } - - if (nView < 1) - nView = 1; + + if (nView < 1 || nDet < 1) { + m_fail = true; + m_failMessage = "nView & nDet must be greater than 0"; + return; + } if (nSample < 1) m_nSample = 1; - if (nDet < 1) - nDet = 1; - + m_nDet = nDet; m_nView = nView; m_nSample = nSample; m_dFocalLengthRatio = dFocalLengthRatio; - m_dFieldOfViewRatio = dFieldOfViewRatio; - m_dFocalLength = (m_phmLen * SQRT2 / 2) * dFocalLengthRatio; - m_dFieldOfView = m_phmLen * SQRT2 * dFieldOfViewRatio; - + m_dCenterDetectorRatio = dCenterDetectorRatio; + m_dViewRatio = dViewRatio; + m_dScanRatio = dScanRatio; + + m_dViewDiameter = phm.getDiameterBoundaryCircle() * m_dViewRatio; + m_dFocalLength = (m_dViewDiameter / 2) * m_dFocalLengthRatio; + m_dCenterDetectorLength = (m_dViewDiameter / 2) * m_dCenterDetectorRatio; + m_dSourceDetectorLength = m_dFocalLength + m_dCenterDetectorLength; + m_dScanDiameter = m_dViewDiameter * m_dScanRatio; + m_dXCenter = phm.xmin() + (phm.xmax() - phm.xmin()) / 2; m_dYCenter = phm.ymin() + (phm.ymax() - phm.ymin()) / 2; m_rotLen = rot_anglen; m_rotInc = m_rotLen / m_nView; if (m_idGeometry == GEOMETRY_PARALLEL) { - m_detLen = m_dFieldOfView; + m_dFanBeamAngle = 0; + m_detLen = m_dScanDiameter; m_detInc = m_detLen / m_nDet; - + double dDetectorArrayEndOffset = 0; + // For even number of detectors, make detInc slightly larger so that center lies + // at nDet/2. Also, extend detector array by one detInc so that all of the phantom is scanned + if (m_nDet % 2 == 0) { // Adjust for Even number of detectors + m_detInc = m_detLen / (m_nDet - 1); // center detector = (nDet/2) + dDetectorArrayEndOffset = m_detInc; + } + double dHalfDetLen = m_detLen / 2; - m_initPos.xs1 = m_dXCenter - m_dFocalLength; - m_initPos.ys1 = m_dYCenter + dHalfDetLen; - m_initPos.xs2 = m_dXCenter + m_dFocalLength; - m_initPos.ys2 = m_dYCenter + dHalfDetLen; - m_initPos.xd1 = m_dXCenter - m_dFocalLength; - m_initPos.yd1 = m_dYCenter - dHalfDetLen; - m_initPos.xd2 = m_dXCenter + m_dFocalLength; - m_initPos.yd2 = m_dYCenter - dHalfDetLen; + m_initPos.xs1 = m_dXCenter - dHalfDetLen; + m_initPos.ys1 = m_dYCenter + m_dFocalLength; + m_initPos.xs2 = m_dXCenter + dHalfDetLen + dDetectorArrayEndOffset; + m_initPos.ys2 = m_dYCenter + m_dFocalLength; + m_initPos.xd1 = m_dXCenter - dHalfDetLen; + m_initPos.yd1 = m_dYCenter - m_dCenterDetectorLength; + m_initPos.xd2 = m_dXCenter + dHalfDetLen + dDetectorArrayEndOffset; + m_initPos.yd2 = m_dYCenter - m_dCenterDetectorLength; m_initPos.angle = 0.0; } else if (m_idGeometry == GEOMETRY_EQUILINEAR) { -#if 0 - double dAngle = (m_dFieldOfView / 2) / cos (asin (m_dFieldOfView / 2 / m_dFocalLength)); -#else - double dHalfSquare = m_dFieldOfView / SQRT2 / 2; - double dFocalPastPhm = m_dFocalLength - dHalfSquare; - if (dFocalPastPhm <= 0.) { + if (m_dScanDiameter / 2 >= m_dFocalLength) { m_fail = true; - m_failMessage = "Focal Point inside of phantom"; + m_failMessage = "Invalid geometry: Focal length must be larger than scan length"; return; } - double dAngle = atan( dHalfSquare / dFocalPastPhm ); -#endif - double dHalfDetLen = 2 * m_dFocalLength * tan (dAngle); + const double dAngle = asin ((m_dScanDiameter / 2) / m_dFocalLength); + const double dHalfDetLen = m_dSourceDetectorLength * tan (dAngle); + m_detLen = dHalfDetLen * 2; m_detInc = m_detLen / m_nDet; - + double dDetectorArrayEndOffset = 0; + if (m_nDet % 2 == 0) { // Adjust for Even number of detectors + m_detInc = m_detLen / (m_nDet - 1); // center detector = (nDet/2) + dDetectorArrayEndOffset = m_detInc; + } + + m_dFanBeamAngle = dAngle * 2; m_initPos.angle = 0.0; m_initPos.xs1 = m_dXCenter; m_initPos.ys1 = m_dYCenter + m_dFocalLength; m_initPos.xs2 = m_dXCenter; m_initPos.ys2 = m_dYCenter + m_dFocalLength; m_initPos.xd1 = m_dXCenter - dHalfDetLen; - m_initPos.yd1 = m_dYCenter - m_dFocalLength; - m_initPos.xd2 = m_dXCenter + dHalfDetLen; - m_initPos.yd2 = m_dYCenter - m_dFocalLength; + m_initPos.yd1 = m_dYCenter - m_dCenterDetectorLength; + m_initPos.xd2 = m_dXCenter + dHalfDetLen + dDetectorArrayEndOffset; + m_initPos.yd2 = m_dYCenter - m_dCenterDetectorLength; m_initPos.angle = 0.0; } else if (m_idGeometry == GEOMETRY_EQUIANGULAR) { -#if 0 - double dAngle = atan ((m_dFieldOfView / 2) / m_dFocalLength); -#else - double dHalfSquare = m_dFieldOfView / SQRT2 / 2; - double dFocalPastPhm = m_dFocalLength - dHalfSquare; - if (dFocalPastPhm <= 0.) { + if (m_dScanDiameter / 2 > m_dFocalLength) { m_fail = true; - m_failMessage = "Focal Point inside of phantom"; + m_failMessage = "Invalid geometry: Focal length must be larger than scan length"; return; } - double dAngle = atan ( dHalfSquare / dFocalPastPhm ); -#endif + const double dAngle = asin ((m_dScanDiameter / 2) / m_dFocalLength); + m_detLen = 2 * dAngle; m_detInc = m_detLen / m_nDet; - - m_dAngularDetIncrement = m_detInc * 2; // Angular Position 2x gamma angle - m_dAngularDetLen = m_detLen * 2; + double dDetectorArrayEndOffset = 0; + if (m_nDet % 2 == 0) { // Adjust for Even number of detectors + m_detInc = m_detLen / (m_nDet - 1); // center detector = (nDet/2) + dDetectorArrayEndOffset = m_detInc; + } + double dA1 = acos ((m_dScanDiameter / 2) / m_dCenterDetectorLength); + double dAngularScale = 2 * (HALFPI + dAngle - dA1) / m_detLen; + m_dAngularDetLen = dAngularScale * (m_detLen + dDetectorArrayEndOffset); + m_dAngularDetIncrement = dAngularScale * m_detInc; m_initPos.dAngularDet = -m_dAngularDetLen / 2; - + + m_dFanBeamAngle = dAngle * 2; m_initPos.angle = 0; m_initPos.xs1 = m_dXCenter; m_initPos.ys1 = m_dYCenter + m_dFocalLength;; m_initPos.xs2 = m_dXCenter; m_initPos.ys2 = m_dYCenter + m_dFocalLength; } - + // Calculate incrementatal rotation matrix GRFMTX_2D temp; xlat_mtx2 (m_rotmtxIncrement, -m_dXCenter, -m_dYCenter); @@ -202,10 +221,10 @@ const char* Scanner::convertGeometryIDToName (const int geomID) { const char *name = ""; - + if (geomID >= 0 && geomID < s_iGeometryCount) - return (s_aszGeometryName[geomID]); - + return (s_aszGeometryName[geomID]); + return (name); } @@ -213,37 +232,37 @@ const char* Scanner::convertGeometryIDToTitle (const int geomID) { const char *title = ""; - + if (geomID >= 0 && geomID < s_iGeometryCount) - return (s_aszGeometryName[geomID]); - + return (s_aszGeometryName[geomID]); + return (title); } - + int Scanner::convertGeometryNameToID (const char* const geomName) { int id = GEOMETRY_INVALID; - + for (int i = 0; i < s_iGeometryCount; i++) - if (strcasecmp (geomName, s_aszGeometryName[i]) == 0) { - id = i; - break; - } - - return (id); + if (strcasecmp (geomName, s_aszGeometryName[i]) == 0) { + id = i; + break; + } + + return (id); } - + /* NAME - * collectProjections Calculate projections for a Phantom - * - * SYNOPSIS - * collectProjections (proj, phm, start_view, nView, bStoreViewPos, trace) - * Projectrions& proj Projection storage - * Phantom& phm Phantom for which we collect projections - * bool bStoreViewPos TRUE then storage proj at normal view position - * int trace Trace level +* collectProjections Calculate projections for a Phantom +* +* SYNOPSIS +* collectProjections (proj, phm, start_view, nView, bStoreViewPos, trace) +* Projectrions& proj Projection storage +* Phantom& phm Phantom for which we collect projections +* bool bStoreViewPos TRUE then storage proj at normal view position +* int trace Trace level */ @@ -254,11 +273,20 @@ Scanner::collectProjections (Projections& proj, const Phantom& phm, const int tr } void -Scanner::collectProjections (Projections& proj, const Phantom& phm, const int iStartView, const int iNumViews, bool bStoreAtViewPosition, const int trace, SGP* pSGP) +Scanner::collectProjections (Projections& proj, const Phantom& phm, const int iStartView, const int iNumViews, + bool bStoreAtViewPosition, const int trace, SGP* pSGP) +{ + int iStorageOffset = (bStoreAtViewPosition ? iStartView : 0); + collectProjections (proj, phm, iStartView, iNumViews, iStorageOffset, trace, pSGP); +} + +void +Scanner::collectProjections (Projections& proj, const Phantom& phm, const int iStartView, const int iNumViews, + int iStorageOffset, const int trace, SGP* pSGP) { m_trace = trace; double start_angle = iStartView * proj.rotInc(); - + // Calculate initial rotation matrix GRFMTX_2D rotmtx_initial, temp; xlat_mtx2 (rotmtx_initial, -m_dXCenter, -m_dYCenter); @@ -266,15 +294,15 @@ Scanner::collectProjections (Projections& proj, const Phantom& phm, const int iS mult_mtx2 (rotmtx_initial, temp, rotmtx_initial); xlat_mtx2 (temp, m_dXCenter, m_dYCenter); mult_mtx2 (rotmtx_initial, temp, rotmtx_initial); - + double xd1=0, yd1=0, xd2=0, yd2=0; if (m_idGeometry != GEOMETRY_EQUIANGULAR) { - xd1 = m_initPos.xd1; - yd1 = m_initPos.yd1; - xd2 = m_initPos.xd2; - yd2 = m_initPos.yd2; - xform_mtx2 (rotmtx_initial, xd1, yd1); // rotate detector endpoints - xform_mtx2 (rotmtx_initial, xd2, yd2); // to initial view_angle + xd1 = m_initPos.xd1; + yd1 = m_initPos.yd1; + xd2 = m_initPos.xd2; + yd2 = m_initPos.yd2; + xform_mtx2 (rotmtx_initial, xd1, yd1); // rotate detector endpoints + xform_mtx2 (rotmtx_initial, xd2, yd2); // to initial view_angle } double xs1 = m_initPos.xs1; @@ -283,87 +311,86 @@ Scanner::collectProjections (Projections& proj, const Phantom& phm, const int iS double ys2 = m_initPos.ys2; xform_mtx2 (rotmtx_initial, xs1, ys1); // rotate source endpoints to xform_mtx2 (rotmtx_initial, xs2, ys2); // initial view angle - + int iView; double viewAngle; for (iView = 0, viewAngle = start_angle; iView < iNumViews; iView++, viewAngle += proj.rotInc()) { - int iStoragePosition = iView; - if (bStoreAtViewPosition) - iStoragePosition += iStartView; + int iStoragePosition = iView + iStorageOffset; DetectorArray& detArray = proj.getDetectorArray( iStoragePosition ); - + #ifdef HAVE_SGP - if (pSGP && m_trace >= Trace::TRACE_PHANTOM) { + if (pSGP && m_trace >= Trace::TRACE_PHANTOM) { m_pSGP = pSGP; - m_pSGP->eraseWindow(); - double dWindowSize = max(m_detLen, m_dFocalLength * 2) * SQRT2; + double dWindowSize = dmax (m_detLen, m_dSourceDetectorLength) * 2; double dHalfWindowSize = dWindowSize / 2; m_dXMinWin = m_dXCenter - dHalfWindowSize; m_dXMaxWin = m_dXCenter + dHalfWindowSize; m_dYMinWin = m_dYCenter - dHalfWindowSize; m_dYMaxWin = m_dYCenter + dHalfWindowSize; - double dHalfPhmLen = m_phmLen / 2; - - m_pSGP->eraseWindow (); - m_pSGP->setWindow (m_dXMinWin, m_dYMinWin, m_dXMaxWin, m_dYMaxWin); - m_pSGP->setRasterOp (RO_COPY); - m_pSGP->setColor (C_RED); - m_pSGP->moveAbs (0., 0.); - m_pSGP->drawRect (m_dXCenter - dHalfPhmLen, m_dYCenter - dHalfPhmLen, m_dXCenter + dHalfPhmLen, m_dYCenter + dHalfPhmLen); - m_pSGP->moveAbs (0., 0.); - m_pSGP->drawCircle (m_dFocalLength); - m_pSGP->setColor (C_BLUE); - phm.draw (*m_pSGP); - m_dTextHeight = m_pSGP->getCharHeight (); - - traceShowParam ("Projection Collector", "%s", PROJECTION_TRACE_ROW_TITLE, C_BLACK, " "); - traceShowParam ("________________", "%s", PROJECTION_TRACE_ROW_TITLE2, C_LTGRAY, " "); - traceShowParam ("Phantom:", "%s", PROJECTION_TRACE_ROW_PHANT_ID, C_BLACK, phm.name().c_str()); - traceShowParam ("Geometry:", "%s", PROJECTION_TRACE_ROW_GEOMETRY, C_BLUE, convertGeometryIDToName(m_idGeometry)); - traceShowParam ("Focal Length Ratio:", "%.2f", PROJECTION_TRACE_ROW_FOCAL_LENGTH, C_BLUE, m_dFocalLengthRatio); - traceShowParam ("Field Of View Ratio:", "%.2f", PROJECTION_TRACE_ROW_FIELD_OF_VIEW, C_BLUE, m_dFieldOfViewRatio); - traceShowParam ("Num Detectors:", "%d", PROJECTION_TRACE_ROW_NDET, C_BLUE, proj.nDet()); - traceShowParam ("Num Views:", "%d", PROJECTION_TRACE_ROW_NVIEW, C_BLUE, proj.nView()); - traceShowParam ("Samples / Ray:", "%d", PROJECTION_TRACE_ROW_SAMPLES, C_BLUE, m_nSample); - - m_pSGP->setMarker (SGP::MARK_BDIAMOND, C_LTGREEN); - } + + m_pSGP->setWindow (m_dXMinWin, m_dYMinWin, m_dXMaxWin, m_dYMaxWin); + m_pSGP->setRasterOp (RO_COPY); + + m_pSGP->setColor (C_RED); + m_pSGP->moveAbs (0., 0.); + m_pSGP->drawCircle (m_dViewDiameter / 2); + + m_pSGP->moveAbs (0., 0.); + m_pSGP->setColor (C_GREEN); + m_pSGP->drawCircle (m_dFocalLength); + m_pSGP->setColor (C_BLUE); + m_pSGP->setTextPointSize (9); + phm.draw (*m_pSGP); + m_dTextHeight = m_pSGP->getCharHeight (); + + traceShowParam ("Phantom:", "%s", PROJECTION_TRACE_ROW_PHANT_ID, C_BLACK, phm.name().c_str()); + traceShowParam ("Geometry:", "%s", PROJECTION_TRACE_ROW_GEOMETRY, C_BLUE, convertGeometryIDToName(m_idGeometry)); + traceShowParam ("Focal Length Ratio:", "%.2f", PROJECTION_TRACE_ROW_FOCAL_LENGTH, C_BLUE, m_dFocalLengthRatio); +// traceShowParam ("Field Of View Ratio:", "%.2f", PROJECTION_TRACE_ROW_FIELD_OF_VIEW, C_BLUE, m_dFieldOfViewRatio); + traceShowParam ("Num Detectors:", "%d", PROJECTION_TRACE_ROW_NDET, C_BLUE, proj.nDet()); + traceShowParam ("Num Views:", "%d", PROJECTION_TRACE_ROW_NVIEW, C_BLUE, proj.nView()); + traceShowParam ("Samples / Ray:", "%d", PROJECTION_TRACE_ROW_SAMPLES, C_BLUE, m_nSample); + + m_pSGP->setMarker (SGP::MARK_BDIAMOND, C_LTGREEN); + } #endif - + #ifdef HAVE_SGP if (m_pSGP && m_trace >= Trace::TRACE_PHANTOM) { m_pSGP->setColor (C_BLACK); m_pSGP->setPenWidth (2); if (m_idGeometry == GEOMETRY_PARALLEL) { - m_pSGP->moveAbs (xs1, ys1); - m_pSGP->lineAbs (xs2, ys2); - m_pSGP->moveAbs (xd1, yd1); - m_pSGP->lineAbs (xd2, yd2); + m_pSGP->moveAbs (xs1, ys1); + m_pSGP->lineAbs (xs2, ys2); + m_pSGP->moveAbs (xd1, yd1); + m_pSGP->lineAbs (xd2, yd2); } else if (m_idGeometry == GEOMETRY_EQUILINEAR) { - m_pSGP->setPenWidth (4); - m_pSGP->moveAbs (xs1, ys1); - m_pSGP->lineAbs (xs2, ys2); - m_pSGP->setPenWidth (2); - m_pSGP->moveAbs (xd1, yd1); - m_pSGP->lineAbs (xd2, yd2); + m_pSGP->setPenWidth (4); + m_pSGP->moveAbs (xs1, ys1); + m_pSGP->lineAbs (xs2, ys2); + m_pSGP->setPenWidth (2); + m_pSGP->moveAbs (xd1, yd1); + m_pSGP->lineAbs (xd2, yd2); } else if (m_idGeometry == GEOMETRY_EQUIANGULAR) { - m_pSGP->setPenWidth (4); - m_pSGP->moveAbs (xs1, ys1); - m_pSGP->lineAbs (xs2, ys2); - m_pSGP->setPenWidth (2); - m_pSGP->moveAbs (0., 0.); - m_pSGP->drawArc (m_dFocalLength, viewAngle + 3 * HALFPI - (m_dAngularDetLen/2), viewAngle + 3 * HALFPI + (m_dAngularDetLen/2)); + m_pSGP->setPenWidth (4); + m_pSGP->moveAbs (xs1, ys1); + m_pSGP->lineAbs (xs2, ys2); + m_pSGP->setPenWidth (2); + m_pSGP->moveAbs (0., 0.); + m_pSGP->drawArc (m_dCenterDetectorLength, viewAngle + 3 * HALFPI - (m_dAngularDetLen/2), viewAngle + 3 * HALFPI + (m_dAngularDetLen/2)); } m_pSGP->setPenWidth (1); } - if (m_trace >= Trace::TRACE_CONSOLE) + if (m_trace > Trace::TRACE_CONSOLE) traceShowParam ("Current View:", "%d (%.0f%%)", PROJECTION_TRACE_ROW_CURR_VIEW, C_RED, iView + iStartView, (iView + iStartView) / static_cast(m_nView) * 100.); #endif - + if (m_trace == Trace::TRACE_CONSOLE) + std::cout << "Current View: " << iView+iStartView << std::endl; + projectSingleView (phm, detArray, xd1, yd1, xd2, yd2, xs1, ys1, xs2, ys2, viewAngle + 3 * HALFPI); detArray.setViewAngle (viewAngle); - + #ifdef HAVE_SGP if (m_pSGP && m_trace >= Trace::TRACE_PHANTOM) { // rs_plot (detArray, xd1, yd1, dXCenter, dYCenter, theta); @@ -372,124 +399,124 @@ Scanner::collectProjections (Projections& proj, const Phantom& phm, const int iS xform_mtx2 (m_rotmtxIncrement, xs1, ys1); xform_mtx2 (m_rotmtxIncrement, xs2, ys2); if (m_idGeometry != GEOMETRY_EQUIANGULAR) { - xform_mtx2 (m_rotmtxIncrement, xd1, yd1); // rotate detector endpoints - xform_mtx2 (m_rotmtxIncrement, xd2, yd2); + xform_mtx2 (m_rotmtxIncrement, xd1, yd1); // rotate detector endpoints + xform_mtx2 (m_rotmtxIncrement, xd2, yd2); } } /* for each iView */ } /* NAME - * rayview Calculate raysums for a view at any angle - * - * SYNOPSIS - * rayview (phm, detArray, xd1, nSample, yd1, xd2, yd2, xs1, ys1, xs2, ys2) - * Phantom& phm Phantom to scan - * DETARRAY *detArray Storage of values for detector array - * Scanner& det Scanner parameters - * double xd1, yd1, xd2, yd2 Beginning & ending detector positions - * double xs1, ys1, xs2, ys2 Beginning & ending source positions - * - * RAY POSITIONING - * For each detector, have there are a variable number of rays traced. - * The source of each ray is the center of the source x-ray cell. The - * detector positions are equally spaced within the cell - * - * The increments between rays are calculated so that the cells start - * at the beginning of a detector cell and they end on the endpoint - * of the cell. Thus, the last cell starts at (xd2-ddx),(yd2-ddy). - * The exception to this is if there is only one ray per detector. - * In that case, the detector position is the center of the detector cell. - */ +* rayview Calculate raysums for a view at any angle +* +* SYNOPSIS +* rayview (phm, detArray, xd1, nSample, yd1, xd2, yd2, xs1, ys1, xs2, ys2) +* Phantom& phm Phantom to scan +* DETARRAY *detArray Storage of values for detector array +* Scanner& det Scanner parameters +* double xd1, yd1, xd2, yd2 Beginning & ending detector positions +* double xs1, ys1, xs2, ys2 Beginning & ending source positions +* +* RAY POSITIONING +* For each detector, have there are a variable number of rays traced. +* The source of each ray is the center of the source x-ray cell. The +* detector positions are equally spaced within the cell +* +* The increments between rays are calculated so that the cells start +* at the beginning of a detector cell and they end on the endpoint +* of the cell. Thus, the last cell starts at (xd2-ddx),(yd2-ddy). +* The exception to this is if there is only one ray per detector. +* In that case, the detector position is the center of the detector cell. +*/ void Scanner::projectSingleView (const Phantom& phm, DetectorArray& detArray, const double xd1, const double yd1, const double xd2, const double yd2, const double xs1, const double ys1, const double xs2, const double ys2, const double dDetAngle) { - + double sdx = (xs2 - xs1) / detArray.nDet(); // change in coords double sdy = (ys2 - ys1) / detArray.nDet(); // between source double xs_maj = xs1 + (sdx / 2); // put ray source in center of cell double ys_maj = ys1 + (sdy / 2); - + double ddx=0, ddy=0, ddx2=0, ddy2=0, ddx2_ofs=0, ddy2_ofs=0, xd_maj=0, yd_maj=0; double dAngleInc=0, dAngleSampleInc=0, dAngleSampleOffset=0, dAngleMajor=0; if (m_idGeometry == GEOMETRY_EQUIANGULAR) { - dAngleInc = m_dAngularDetIncrement; - dAngleSampleInc = dAngleInc / m_nSample; - dAngleSampleOffset = dAngleSampleInc / 2; - dAngleMajor = dDetAngle - (m_dAngularDetLen/2) + dAngleSampleOffset; + dAngleInc = m_dAngularDetIncrement; + dAngleSampleInc = dAngleInc / m_nSample; + dAngleSampleOffset = dAngleSampleInc / 2; + dAngleMajor = dDetAngle - (m_dAngularDetLen/2) + dAngleSampleOffset; } else { - ddx = (xd2 - xd1) / detArray.nDet(); // change in coords - ddy = (yd2 - yd1) / detArray.nDet(); // between detectors - ddx2 = ddx / m_nSample; // Incr. between rays with detector cell - ddy2 = ddy / m_nSample; // Doesn't include detector endpoints - ddx2_ofs = ddx2 / 2; // offset of 1st ray from start of detector cell - ddy2_ofs = ddy2 / 2; - - xd_maj = xd1 + ddx2_ofs; // Incr. between detector cells - yd_maj = yd1 + ddy2_ofs; + ddx = (xd2 - xd1) / detArray.nDet(); // change in coords + ddy = (yd2 - yd1) / detArray.nDet(); // between detectors + ddx2 = ddx / m_nSample; // Incr. between rays with detector cell + ddy2 = ddy / m_nSample; // Doesn't include detector endpoints + ddx2_ofs = ddx2 / 2; // offset of 1st ray from start of detector cell + ddy2_ofs = ddy2 / 2; + + xd_maj = xd1 + ddx2_ofs; // Incr. between detector cells + yd_maj = yd1 + ddy2_ofs; } - + DetectorValue* detval = detArray.detValues(); - + if (phm.getComposition() == P_UNIT_PULSE) { // put unit pulse in center of view for (int d = 0; d < detArray.nDet(); d++) if (detArray.nDet() / 2 == d && (d % 2) == 1) - detval[d] = 1; + detval[d] = 1; else - detval[d] = 0; + detval[d] = 0; } else { - for (int d = 0; d < detArray.nDet(); d++) { + for (int d = 0; d < detArray.nDet(); d++) { double xs = xs_maj; double ys = ys_maj; double xd=0, yd=0, dAngle=0; if (m_idGeometry == GEOMETRY_EQUIANGULAR) { - dAngle = dAngleMajor; + dAngle = dAngleMajor; } else { - xd = xd_maj; - yd = yd_maj; + xd = xd_maj; + yd = yd_maj; } double sum = 0.0; for (unsigned int i = 0; i < m_nSample; i++) { - if (m_idGeometry == GEOMETRY_EQUIANGULAR) { - xd = m_dFocalLength * cos (dAngle); - yd = m_dFocalLength * sin (dAngle); - } - + if (m_idGeometry == GEOMETRY_EQUIANGULAR) { + xd = m_dCenterDetectorLength * cos (dAngle); + yd = m_dCenterDetectorLength * sin (dAngle); + } + #ifdef HAVE_SGP - if (m_pSGP && m_trace >= Trace::TRACE_PROJECTIONS) { - m_pSGP->setColor (C_YELLOW); - m_pSGP->setRasterOp (RO_AND); - m_pSGP->moveAbs (xs, ys); - m_pSGP->lineAbs (xd, yd); - } + if (m_pSGP && m_trace >= Trace::TRACE_PROJECTIONS) { + m_pSGP->setColor (C_YELLOW); + m_pSGP->setRasterOp (RO_AND); + m_pSGP->moveAbs (xs, ys); + m_pSGP->lineAbs (xd, yd); + } #endif - - sum += projectSingleLine (phm, xd, yd, xs, ys); - + + sum += projectSingleLine (phm, xd, yd, xs, ys); + #ifdef HAVE_SGP - if (m_trace >= Trace::TRACE_CLIPPING) { - traceShowParam ("Attenuation:", "%s", PROJECTION_TRACE_ROW_ATTEN, C_LTMAGENTA, " "); - traceShowParam ("Attenuation:", "%.3f", PROJECTION_TRACE_ROW_ATTEN, C_LTMAGENTA, sum); - } + // if (m_trace >= Trace::TRACE_CLIPPING) { + // traceShowParam ("Attenuation:", "%s", PROJECTION_TRACE_ROW_ATTEN, C_LTMAGENTA, " "); + // traceShowParam ("Attenuation:", "%.3f", PROJECTION_TRACE_ROW_ATTEN, C_LTMAGENTA, sum); + // } #endif - if (m_idGeometry == GEOMETRY_EQUIANGULAR) - dAngle += dAngleSampleInc; - else { - xd += ddx2; - yd += ddy2; - } + if (m_idGeometry == GEOMETRY_EQUIANGULAR) + dAngle += dAngleSampleInc; + else { + xd += ddx2; + yd += ddy2; + } } // for each sample in detector - + detval[d] = sum / m_nSample; xs_maj += sdx; ys_maj += sdy; if (m_idGeometry == GEOMETRY_EQUIANGULAR) - dAngleMajor += dAngleInc; - else { - xd_maj += ddx; - yd_maj += ddy; - } + dAngleMajor += dAngleInc; + else { + xd_maj += ddx; + yd_maj += ddy; + } } /* for each detector */ } /* if not unit pulse */ } @@ -500,7 +527,11 @@ Scanner::traceShowParam (const char *szLabel, const char *fmt, int row, int colo { va_list arg; va_start(arg, color); +#ifdef HAVE_SGP traceShowParamRasterOp (RO_COPY, szLabel, fmt, row, color, arg); +#else + traceShowParamRasterOp (0, szLabel, fmt, row, color, arg); +#endif va_end(arg); } @@ -509,7 +540,11 @@ Scanner::traceShowParamXOR (const char *szLabel, const char *fmt, int row, int c { va_list arg; va_start(arg, color); +#ifdef HAVE_SGP traceShowParamRasterOp (RO_XOR, szLabel, fmt, row, color, arg); +#else + traceShowParamRasterOp (0, szLabel, fmt, row, color, arg); +#endif va_end(arg); } @@ -517,23 +552,33 @@ void Scanner::traceShowParamRasterOp (int iRasterOp, const char *szLabel, const char *fmt, int row, int color, va_list args) { char szValue[256]; - + vsnprintf (szValue, sizeof(szValue), fmt, args); - - // cio_set_cpos (raysum_trace_menu_column, row); - // cio_set_text_clr (color - 8, 0); - // cio_set_text_clr (color, 0); - + +#ifdef HAVE_SGP if (m_pSGP) { m_pSGP->setRasterOp (iRasterOp); - double dYPos = m_dYMaxWin - (row * m_dTextHeight); - m_pSGP->moveAbs (m_dXMinWin, dYPos); m_pSGP->setTextColor (color, -1); - m_pSGP->drawText (szLabel); - double dValueOffset = (m_dXMaxWin - m_dXMinWin) / 5; - m_pSGP->moveAbs (m_dXMinWin + dValueOffset, dYPos); - m_pSGP->drawText (szValue); - } else { + double dValueOffset = (m_dXMaxWin - m_dXMinWin) / 4; + if (row < 4) { + double dYPos = m_dYMaxWin - (row * m_dTextHeight); + double dXPos = m_dXMinWin; + m_pSGP->moveAbs (dXPos, dYPos); + m_pSGP->drawText (szLabel); + m_pSGP->moveAbs (dXPos + dValueOffset, dYPos); + m_pSGP->drawText (szValue); + } else { + row -= 4; + double dYPos = m_dYMaxWin - (row * m_dTextHeight); + double dXPos = m_dXMinWin + (m_dXMaxWin - m_dXMinWin) * 0.5; + m_pSGP->moveAbs (dXPos, dYPos); + m_pSGP->drawText (szLabel); + m_pSGP->moveAbs (dXPos + dValueOffset, dYPos); + m_pSGP->drawText (szValue); + } + } else +#endif + { cio_put_str (szLabel); cio_put_str (szValue); cio_put_str ("\n"); @@ -543,14 +588,14 @@ Scanner::traceShowParamRasterOp (int iRasterOp, const char *szLabel, const char /* NAME - * projectSingleLine INTERNAL: Calculates raysum along a line for a Phantom - * - * SYNOPSIS - * rsum = phm_ray_attenuation (phm, x1, y1, x2, y2) - * double rsum Ray sum of Phantom along given line - * Phantom& phm; Phantom from which to calculate raysum - * double *x1, *y1, *x2, y2 Endpoints of ray path (in Phantom coords) - */ +* projectSingleLine INTERNAL: Calculates raysum along a line for a Phantom +* +* SYNOPSIS +* rsum = phm_ray_attenuation (phm, x1, y1, x2, y2) +* double rsum Ray sum of Phantom along given line +* Phantom& phm; Phantom from which to calculate raysum +* double *x1, *y1, *x2, y2 Endpoints of ray path (in Phantom coords) +*/ double Scanner::projectSingleLine (const Phantom& phm, const double x1, const double y1, const double x2, const double y2) @@ -559,20 +604,20 @@ Scanner::projectSingleLine (const Phantom& phm, const double x1, const double y1 double rsum = 0.0; for (PElemConstIterator i = phm.listPElem().begin(); i != phm.listPElem().end(); i++) rsum += projectLineAgainstPElem (**i, x1, y1, x2, y2); - + return (rsum); } /* NAME - * pelem_ray_attenuation Calculate raysum of an pelem along one line - * - * SYNOPSIS - * rsum = pelem_ray_attenuation (pelem, x1, y1, x2, y2) - * double rsum Computed raysum - * PhantomElement& pelem Pelem to scan - * double x1, y1, x2, y2 Endpoints of raysum line - */ +* pelem_ray_attenuation Calculate raysum of an pelem along one line +* +* SYNOPSIS +* rsum = pelem_ray_attenuation (pelem, x1, y1, x2, y2) +* double rsum Computed raysum +* PhantomElement& pelem Pelem to scan +* double x1, y1, x2, y2 Endpoints of raysum line +*/ double Scanner::projectLineAgainstPElem (const PhantomElement& pelem, double x1, double y1, double x2, double y2) @@ -582,7 +627,7 @@ Scanner::projectLineAgainstPElem (const PhantomElement& pelem, double x1, double cio_tone (1000., 0.05); return (0.0); } - + #ifdef HAVE_SGP if (m_pSGP && m_trace == Trace::TRACE_CLIPPING) { m_pSGP->setRasterOp (RO_XOR); @@ -594,7 +639,7 @@ Scanner::projectLineAgainstPElem (const PhantomElement& pelem, double x1, double m_pSGP->setRasterOp (RO_SET); } #endif - + double len = lineLength (x1, y1, x2, y2); return (len * pelem.atten()); }