m_rScanner.collectProjections (m_rProjections, m_rPhantom, iViewNumber, 1, true, m_iTrace, m_pSGP);
::wxYield(); // update the display
if (m_iTrace >= Trace::TRACE_PLOT) {
m_rScanner.collectProjections (m_rProjections, m_rPhantom, iViewNumber, 1, true, m_iTrace, m_pSGP);
::wxYield(); // update the display
if (m_iTrace >= Trace::TRACE_PLOT) {