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/* |
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Teem: Tools to process and visualize scientific data and images . |
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Copyright (C) 2013, 2012, 2011, 2010, 2009 University of Chicago |
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Copyright (C) 2008, 2007, 2006, 2005 Gordon Kindlmann |
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Copyright (C) 2004, 2003, 2002, 2001, 2000, 1999, 1998 University of Utah |
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This library is free software; you can redistribute it and/or |
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modify it under the terms of the GNU Lesser General Public License |
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(LGPL) as published by the Free Software Foundation; either |
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version 2.1 of the License, or (at your option) any later version. |
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The terms of redistributing and/or modifying this software also |
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include exceptions to the LGPL that facilitate static linking. |
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This library is distributed in the hope that it will be useful, |
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but WITHOUT ANY WARRANTY; without even the implied warranty of |
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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Lesser General Public License for more details. |
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You should have received a copy of the GNU Lesser General Public License |
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along with this library; if not, write to Free Software Foundation, Inc., |
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51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
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*/ |
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#include "ten.h" |
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#include "privateTen.h" |
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/* NOTE: this model is a single 2nd-order tensor, not a two-tensor model */ |
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#define PARM_NUM 7 |
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/* 1/sqrt(2) */ |
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#define OST 0.70710678118654752440 |
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static const tenModelParmDesc |
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parmDesc[] = { |
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/* 0 */ {"B0", 0.0, TEN_MODEL_B0_MAX, AIR_FALSE, AIR_FALSE, 0}, |
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/* 1 */ {"Dxx", -TEN_MODEL_DIFF_MAX, TEN_MODEL_DIFF_MAX, AIR_FALSE, AIR_FALSE, 0}, |
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/* 2 */ {"Dxy", -TEN_MODEL_DIFF_MAX*OST, TEN_MODEL_DIFF_MAX*OST, AIR_FALSE, AIR_FALSE, 0}, |
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/* 3 */ {"Dxz", -TEN_MODEL_DIFF_MAX*OST, TEN_MODEL_DIFF_MAX*OST, AIR_FALSE, AIR_FALSE, 0}, |
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/* 4 */ {"Dyy", -TEN_MODEL_DIFF_MAX, TEN_MODEL_DIFF_MAX, AIR_FALSE, AIR_FALSE, 0}, |
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/* 5 */ {"Dyz", -TEN_MODEL_DIFF_MAX*OST, TEN_MODEL_DIFF_MAX*OST, AIR_FALSE, AIR_FALSE, 0}, |
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/* 6 */ {"Dzz", -TEN_MODEL_DIFF_MAX, TEN_MODEL_DIFF_MAX, AIR_FALSE, AIR_FALSE, 0} |
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}; |
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static void |
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simulate(double *dwiSim, const double *parm, const tenExperSpec *espec) { |
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unsigned int ii; |
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double b0; |
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b0 = parm[0]; |
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✓✓ |
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for (ii=0; ii<espec->imgNum; ii++) { |
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double adc, bb; |
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bb = espec->bval[ii]; |
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/* safe because TEN_T3V_CONTR never looks at parm[0] */ |
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adc = TEN_T3V_CONTR(parm, espec->grad + 3*ii); |
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dwiSim[ii] = b0*exp(-bb*adc); |
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} |
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return; |
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} |
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static char * |
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parmSprint(char str[AIR_STRLEN_MED], const double *parm) { |
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sprintf(str, "(%g) [%g %g %g; %g %g; %g]", parm[0], |
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parm[1], parm[2], parm[3], |
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parm[4], parm[5], |
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parm[6]); |
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return str; |
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} |
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_TEN_PARM_ALLOC |
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_TEN_PARM_RAND |
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_TEN_PARM_STEP |
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_TEN_PARM_DIST |
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_TEN_PARM_COPY |
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static int |
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parmConvert(double *parmDst, const double *parmSrc, |
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const tenModel *modelSrc) { |
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int ret; |
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if (modelSrc == tenModelBall) { |
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TEN_T_SET(parmDst, parmSrc[0], |
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parmSrc[1], 0, 0, |
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parmSrc[1], 0, |
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parmSrc[1]); |
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ret = 0; |
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} else if (modelSrc == tenModel1Stick) { |
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double ten[7]; |
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TEN_T3V_OUTER(ten, parmSrc + 2); |
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TEN_T_SCALE(parmDst, parmSrc[1], ten); |
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parmDst[0] = parmSrc[0]; |
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ret = 0; |
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} else if (modelSrc == tenModelBall1Stick) { |
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double stick[7], ball[7], diff, frac; |
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diff = parmSrc[1]; |
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frac = parmSrc[2]; |
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TEN_T3V_OUTER(stick, parmSrc + 3); |
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TEN_T_SCALE(stick, diff, stick); |
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TEN_T_SET(ball, 1, diff, 0, 0, diff, 0, diff); |
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TEN_T_LERP(parmDst, frac, ball, stick); |
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parmDst[0] = parmSrc[0]; |
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ret = 1; |
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} else if (modelSrc == tenModel1Cylinder) { |
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double stick[7], ball[7], len, rad; |
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len = parmSrc[1]; |
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rad = parmSrc[2]; |
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TEN_T3V_OUTER(stick, parmSrc + 3); |
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TEN_T_SCALE(stick, len-rad, stick); |
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TEN_T_SET(ball, 1, rad, 0, 0, rad, 0, rad); |
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TEN_T_ADD(parmDst, ball, stick); |
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parmDst[0] = parmSrc[0]; |
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ret = 0; |
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} else if (modelSrc == tenModel1Tensor2) { |
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parmCopy(parmDst, parmSrc); |
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ret = 0; |
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} else { |
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unsigned int ii; |
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for (ii=0; ii<PARM_NUM; ii++) { |
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parmDst[ii] = AIR_NAN; |
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} |
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ret = 2; |
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} |
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return ret; |
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} |
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_TEN_SQE |
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_TEN_SQE_GRAD_CENTDIFF |
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_TEN_SQE_FIT(tenModel1Tensor2) |
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_TEN_NLL |
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_TEN_NLL_GRAD_STUB |
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_TEN_NLL_FIT_STUB |
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tenModel |
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_tenModel1Tensor2 = { |
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TEN_MODEL_STR_1TENSOR2, |
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_TEN_MODEL_FIELDS |
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}; |
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const tenModel *const tenModel1Tensor2 = &_tenModel1Tensor2; |