** This is part of the CTSim program
** Copyright (c) 1983-2001 Kevin Rosenberg
**
-** $Id: scanner.cpp,v 1.29 2001/02/04 21:28:19 kevin Exp $
+** $Id: scanner.cpp,v 1.30 2001/02/08 06:25:07 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
* 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)
+Scanner::Scanner (const Phantom& phm, const char* const geometryName,
+ int nDet, int nView, int nSample, const double rot_anglen,
+ const double dFocalLengthRatio, const double dViewRatio,
+ double dScanRatio)
{
- m_phmLen = phm.maxAxisLength(); // maximal length along an axis
-
m_fail = false;
m_idGeometry = convertGeometryNameToID (geometryName);
if (m_idGeometry == GEOMETRY_INVALID) {
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_dViewRatio = dViewRatio;
+ m_dScanRatio = dScanRatio;
+ m_dViewDiameter = phm.getDiameterBoundaryCircle() * m_dViewRatio;
+ m_dFocalLength = (m_dViewDiameter / 2) * dFocalLengthRatio;
+ 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_detLen = m_dScanDiameter;
m_detInc = m_detLen / m_nDet;
if (m_nDet % 2 == 0) // Adjust for Even number of detectors
m_detInc = m_detLen / (m_nDet - 1); // center detector = (nDet/2)-1
+ m_dFanBeamAngle = 0;
double dHalfDetLen = m_detLen / 2;
m_initPos.xs1 = m_dXCenter - dHalfDetLen;
m_initPos.ys1 = m_dYCenter + m_dFocalLength;
m_initPos.yd2 = m_dYCenter - m_dFocalLength;
m_initPos.angle = 0.0;
} else if (m_idGeometry == GEOMETRY_EQUILINEAR) {
-#if 0
- double dAngle1 = atan ((m_dFieldOfView / 2) / m_dFocalLength);
- double dHalfSquare = m_dFieldOfView / SQRT2 / 2;
- double dFocalPastPhm = m_dFocalLength - dHalfSquare;
- if (dFocalPastPhm <= 0.) {
- m_fail = true;
- m_failMessage = "Focal Point inside of phantom";
- return;
- }
- double dAngle2 = atan( dHalfSquare / dFocalPastPhm );
- double dAngle = maxValue<double> (dAngle1, dAngle2);
- //double dAngle = (m_dFieldOfView / 2) / cos (asin (m_dFieldOfView / 2 / m_dFocalLength));
-#else
- if (m_dFieldOfView/2 >= m_dFocalLength) {
+ if (m_dScanDiameter / 2 >= m_dFocalLength) {
m_fail = true;
- m_failMessage = "Invalid geometry: Focal length must be larger than field of view";
+ m_failMessage = "Invalid geometry: Focal length must be larger than scan length";
return;
}
- double dAngle = asin ((m_dFieldOfView/2) / m_dFocalLength);
-#endif
-
- double dHalfDetLen = 2 * m_dFocalLength * tan (dAngle);
+ const double dAngle = asin ((m_dScanDiameter / 2) / m_dFocalLength);
+ const double dHalfDetLen = 2 * m_dFocalLength * tan (dAngle);
m_detLen = dHalfDetLen * 2;
m_detInc = m_detLen / m_nDet;
if (m_nDet % 2 == 0) // Adjust for Even number of detectors
m_detInc = m_detLen / (m_nDet - 1); // center detector = (nDet/2)-1
-
+
+ m_dFanBeamAngle = dAngle * 2;
m_initPos.angle = 0.0;
m_initPos.xs1 = m_dXCenter;
m_initPos.ys1 = m_dYCenter + m_dFocalLength;
m_initPos.yd2 = m_dYCenter - m_dFocalLength;
m_initPos.angle = 0.0;
} else if (m_idGeometry == GEOMETRY_EQUIANGULAR) {
- if (m_dFieldOfView/2 > m_dFocalLength) {
+ if (m_dScanDiameter / 2 > m_dFocalLength) {
m_fail = true;
- m_failMessage = "Invalid geometry: Focal length must be larger than field of view";
+ m_failMessage = "Invalid geometry: Focal length must be larger than scan length";
return;
}
- double dAngle = asin ((m_dFieldOfView/2) / m_dFocalLength);
+ const double dAngle = asin ((m_dScanDiameter / 2) / m_dFocalLength);
m_detLen = 2 * dAngle;
m_detInc = m_detLen / m_nDet;
m_dAngularDetLen = m_detLen * 2;
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_dXMaxWin = m_dXCenter + dHalfWindowSize;
m_dYMinWin = m_dYCenter - dHalfWindowSize;
m_dYMaxWin = m_dYCenter + dHalfWindowSize;
- double dHalfPhmLen = m_phmLen / 2;
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->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);
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 ("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);
projects / ctsim.git / blobdiff