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<div class="title">imgdecay.c</div> </div>
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<a href="imgdecay_8c.html">Go to the documentation of this file.</a><div class="fragment"><pre class="fragment"><a name="l00001"></a>00001 <span class="comment">/******************************************************************************</span>
<a name="l00002"></a>00002 <span class="comment"></span>
<a name="l00003"></a>00003 <span class="comment"> Copyright (c) 2007,2008 Turku PET Centre</span>
<a name="l00004"></a>00004 <span class="comment"></span>
<a name="l00005"></a>00005 <span class="comment"> Library: imgdecay</span>
<a name="l00006"></a>00006 <span class="comment"> Description: Functions for working with physical decay and isotopes in IMG.</span>
<a name="l00007"></a>00007 <span class="comment"></span>
<a name="l00008"></a>00008 <span class="comment"> This library is free software; you can redistribute it and/or</span>
<a name="l00009"></a>00009 <span class="comment"> modify it under the terms of the GNU Lesser General Public</span>
<a name="l00010"></a>00010 <span class="comment"> License as published by the Free Software Foundation; either</span>
<a name="l00011"></a>00011 <span class="comment"> version 2.1 of the License, or (at your option) any later version.</span>
<a name="l00012"></a>00012 <span class="comment"></span>
<a name="l00013"></a>00013 <span class="comment"> This library is distributed in the hope that it will be useful,</span>
<a name="l00014"></a>00014 <span class="comment"> but WITHOUT ANY WARRANTY; without even the implied warranty of</span>
<a name="l00015"></a>00015 <span class="comment"> MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.</span>
<a name="l00016"></a>00016 <span class="comment"> See the GNU Lesser General Public License for more details:</span>
<a name="l00017"></a>00017 <span class="comment"> http://www.gnu.org/copyleft/lesser.html</span>
<a name="l00018"></a>00018 <span class="comment"></span>
<a name="l00019"></a>00019 <span class="comment"> You should have received a copy of the GNU Lesser General Public License</span>
<a name="l00020"></a>00020 <span class="comment"> along with this library/program; if not, write to the Free Software</span>
<a name="l00021"></a>00021 <span class="comment"> Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA </span>
<a name="l00022"></a>00022 <span class="comment"></span>
<a name="l00023"></a>00023 <span class="comment"> Turku PET Centre, Turku, Finland, http://www.turkupetcentre.fi/</span>
<a name="l00024"></a>00024 <span class="comment"></span>
<a name="l00025"></a>00025 <span class="comment"> Modification history:</span>
<a name="l00026"></a>00026 <span class="comment"> 2007-02-01 Vesa Oikonen</span>
<a name="l00027"></a>00027 <span class="comment"> First created this file in libtpcimgio 1.2.0.</span>
<a name="l00028"></a>00028 <span class="comment"> Functions now apply libtpcmisc 1.2.0 as far as possible.</span>
<a name="l00029"></a>00029 <span class="comment"> Added function imgSetDecayCorrFactors().</span>
<a name="l00030"></a>00030 <span class="comment"> 2008-07-07 VO</span>
<a name="l00031"></a>00031 <span class="comment"> Decay correction functions check (superficially) that image data contains</span>
<a name="l00032"></a>00032 <span class="comment"> frames times.</span>
<a name="l00033"></a>00033 <span class="comment"></span>
<a name="l00034"></a>00034 <span class="comment"></span>
<a name="l00035"></a>00035 <span class="comment">******************************************************************************/</span>
<a name="l00036"></a>00036 <span class="preprocessor">#include <stdio.h></span>
<a name="l00037"></a>00037 <span class="preprocessor">#include <stdlib.h></span>
<a name="l00038"></a>00038 <span class="preprocessor">#include <math.h></span>
<a name="l00039"></a>00039 <span class="preprocessor">#include <time.h></span>
<a name="l00040"></a>00040 <span class="preprocessor">#include <string.h></span>
<a name="l00041"></a>00041 <span class="preprocessor">#include <ctype.h></span>
<a name="l00042"></a>00042 <span class="comment">/*****************************************************************************/</span>
<a name="l00043"></a>00043 <span class="preprocessor">#include "halflife.h"</span>
<a name="l00044"></a>00044 <span class="comment">/*****************************************************************************/</span>
<a name="l00045"></a>00045 <span class="preprocessor">#include "<a class="code" href="img_8h.html">include/img.h</a>"</span>
<a name="l00046"></a>00046 <span class="preprocessor">#include "<a class="code" href="imgdecay_8h.html">include/imgdecay.h</a>"</span>
<a name="l00047"></a>00047 <span class="comment">/*****************************************************************************/</span>
<a name="l00048"></a>00048
<a name="l00049"></a>00049 <span class="comment">/*****************************************************************************/</span>
<a name="l00059"></a><a class="code" href="imgdecay_8h.html#a9014e4708608b3dc30a8675900ab8e56">00059</a> <span class="keywordtype">int</span> <a class="code" href="imgdecay_8c.html#aca202ac5405029b712c23d6e10a5475d">imgDecayCorrection</a>(<a class="code" href="structIMG.html">IMG</a> *image, <span class="keywordtype">int</span> mode) {
<a name="l00060"></a>00060 <span class="keywordtype">int</span> pi, fi, i, j;
<a name="l00061"></a>00061 <span class="keywordtype">float</span> lambda;
<a name="l00062"></a>00062 <span class="keywordtype">float</span> cf, dur;
<a name="l00063"></a>00063
<a name="l00064"></a>00064 <span class="comment">/* Check for arguments */</span>
<a name="l00065"></a>00065 <span class="keywordflow">if</span>(image-><a class="code" href="structIMG.html#a5b8bdc61088df4a3c3f89c31895b14a4">status</a>!=<a class="code" href="img_8h.html#a3117b1b0649d3761dcda1395202129e5">IMG_STATUS_OCCUPIED</a>) <span class="keywordflow">return</span>(1);
<a name="l00066"></a>00066 <span class="keywordflow">if</span>(image-><a class="code" href="structIMG.html#ac9c048a9dc8205b22518b05486d8030b">isotopeHalflife</a><=0.0) <span class="keywordflow">return</span>(1);
<a name="l00067"></a>00067 <span class="comment">/* Existing/nonexisting decay correction is an error */</span>
<a name="l00068"></a>00068 <span class="keywordflow">if</span>(mode==1 && image-><a class="code" href="structIMG.html#a6ce801dea67ec8224e8cfc9aebb8a909">decayCorrected</a>!=0) <span class="keywordflow">return</span>(2);
<a name="l00069"></a>00069 <span class="keywordflow">if</span>(mode==0 && image-><a class="code" href="structIMG.html#a6ce801dea67ec8224e8cfc9aebb8a909">decayCorrected</a>==0) <span class="keywordflow">return</span>(2);
<a name="l00070"></a>00070
<a name="l00071"></a>00071 <span class="comment">/* All time frames */</span>
<a name="l00072"></a>00072 <span class="keywordflow">for</span>(fi=0; fi<image-><a class="code" href="structIMG.html#a77605d4aa64b86294590c79e9a761b15">dimt</a>; fi++) {
<a name="l00073"></a>00073 dur=image-><a class="code" href="structIMG.html#aa2b629a51ca62bcafad0a66d32e1ca8b">end</a>[fi]-image-><a class="code" href="structIMG.html#a8ff22fc209b6f44ad14341c8644788d2">start</a>[fi];
<a name="l00074"></a>00074 <span class="keywordflow">if</span>(image-><a class="code" href="structIMG.html#aa2b629a51ca62bcafad0a66d32e1ca8b">end</a>[fi]>0.0) {
<a name="l00075"></a>00075 <span class="keywordflow">if</span>(mode==0 && image-><a class="code" href="structIMG.html#abf0ad6e681d08c3248dbd9837afa9973">decayCorrFactor</a>[fi]>1.000001) {
<a name="l00076"></a>00076 <span class="comment">/* if decay correction is to be removed, and factor is known, then use it */</span>
<a name="l00077"></a>00077 cf=1.0/image-><a class="code" href="structIMG.html#abf0ad6e681d08c3248dbd9837afa9973">decayCorrFactor</a>[fi];
<a name="l00078"></a>00078 } <span class="keywordflow">else</span> {
<a name="l00079"></a>00079 lambda=hl2lambda(image-><a class="code" href="structIMG.html#ac9c048a9dc8205b22518b05486d8030b">isotopeHalflife</a>); <span class="keywordflow">if</span>(lambda<0.0) <span class="keywordflow">return</span>(1);
<a name="l00080"></a>00080 <span class="keywordflow">if</span>(mode==0) lambda=-lambda; <span class="comment">/* remove decay correction by giving negative lambda */</span>
<a name="l00081"></a>00081 <span class="keywordflow">if</span>(fi==image-><a class="code" href="structIMG.html#a77605d4aa64b86294590c79e9a761b15">dimt</a>-1 && image-><a class="code" href="structIMG.html#aa2b629a51ca62bcafad0a66d32e1ca8b">end</a>[fi]<=0.0) <span class="keywordflow">return</span>(3);
<a name="l00082"></a>00082 cf=hlLambda2factor_float(lambda, image-><a class="code" href="structIMG.html#a8ff22fc209b6f44ad14341c8644788d2">start</a>[fi], dur);
<a name="l00083"></a>00083 }
<a name="l00084"></a>00084 <span class="keywordflow">if</span>(<a class="code" href="img_8h.html#a0d66ed136e5992b7b00ce6f43bad1439">IMG_TEST</a>) printf(<span class="stringliteral">"applied_dc_factor[%d] := %g\n"</span>, fi+1, cf);
<a name="l00085"></a>00085 <span class="comment">/* Set decay correction factor inside IMG for future */</span>
<a name="l00086"></a>00086 <span class="keywordflow">if</span>(mode==0) {
<a name="l00087"></a>00087 image-><a class="code" href="structIMG.html#abf0ad6e681d08c3248dbd9837afa9973">decayCorrFactor</a>[fi]=1.0;
<a name="l00088"></a>00088 } <span class="keywordflow">else</span> {
<a name="l00089"></a>00089 image-><a class="code" href="structIMG.html#abf0ad6e681d08c3248dbd9837afa9973">decayCorrFactor</a>[fi]=cf;
<a name="l00090"></a>00090 }
<a name="l00091"></a>00091 <span class="comment">/* All planes, all matrices */</span>
<a name="l00092"></a>00092 <span class="keywordflow">for</span>(pi=0; pi<image-><a class="code" href="structIMG.html#a9c04780b47e6a627a2b700b76352c3fc">dimz</a>; pi++)
<a name="l00093"></a>00093 <span class="keywordflow">for</span>(i=0; i<image-><a class="code" href="structIMG.html#aa17e87812503d3c142f31c08abcbf79d">dimy</a>; i++)
<a name="l00094"></a>00094 <span class="keywordflow">for</span>(j=0; j<image-><a class="code" href="structIMG.html#a0818b82059710627a94282a793ff7030">dimx</a>; j++)
<a name="l00095"></a>00095 image-><a class="code" href="structIMG.html#a43e2c98dc0728731601a76abd51bb935">m</a>[pi][i][j][fi]*=cf;
<a name="l00096"></a>00096 image-><a class="code" href="structIMG.html#a6ce801dea67ec8224e8cfc9aebb8a909">decayCorrected</a>=mode; <span class="comment">/* in some cases left unchanged! */</span>
<a name="l00097"></a>00097 }
<a name="l00098"></a>00098 } <span class="comment">/* next frame */</span>
<a name="l00099"></a>00099 <span class="keywordflow">return</span>(0);
<a name="l00100"></a>00100 }
<a name="l00101"></a>00101 <span class="comment">/*****************************************************************************/</span>
<a name="l00102"></a>00102
<a name="l00103"></a>00103 <span class="comment">/*****************************************************************************/</span>
<a name="l00110"></a><a class="code" href="imgdecay_8h.html#a14db419685f526306032a84343eed72c">00110</a> <span class="keywordtype">char</span> *<a class="code" href="imgdecay_8c.html#a14db419685f526306032a84343eed72c">imgIsotope</a>(<a class="code" href="structIMG.html">IMG</a> *img) {
<a name="l00111"></a>00111 <span class="keywordflow">return</span>(hlIsotopeCode(hlIsotopeFromHalflife(img-><a class="code" href="structIMG.html#ac9c048a9dc8205b22518b05486d8030b">isotopeHalflife</a>/60.0)));
<a name="l00112"></a>00112 }
<a name="l00113"></a>00113 <span class="comment">/*****************************************************************************/</span>
<a name="l00114"></a>00114
<a name="l00115"></a>00115 <span class="comment">/*****************************************************************************/</span>
<a name="l00126"></a><a class="code" href="imgdecay_8h.html#aae808fa5427e1bf0c499df93073553bf">00126</a> <span class="keywordtype">int</span> <a class="code" href="imgdecay_8c.html#aae808fa5427e1bf0c499df93073553bf">imgSetDecayCorrFactors</a>(<a class="code" href="structIMG.html">IMG</a> *image, <span class="keywordtype">int</span> mode) {
<a name="l00127"></a>00127 <span class="keywordtype">int</span> fi;
<a name="l00128"></a>00128 <span class="keywordtype">float</span> lambda, cf, dur;
<a name="l00129"></a>00129
<a name="l00130"></a>00130 <span class="comment">/* Check for arguments */</span>
<a name="l00131"></a>00131 <span class="keywordflow">if</span>(image-><a class="code" href="structIMG.html#a5b8bdc61088df4a3c3f89c31895b14a4">status</a>!=<a class="code" href="img_8h.html#a3117b1b0649d3761dcda1395202129e5">IMG_STATUS_OCCUPIED</a>) <span class="keywordflow">return</span>(1);
<a name="l00132"></a>00132 <span class="keywordflow">if</span>(image-><a class="code" href="structIMG.html#ac9c048a9dc8205b22518b05486d8030b">isotopeHalflife</a><=0.0) <span class="keywordflow">return</span>(1);
<a name="l00133"></a>00133
<a name="l00134"></a>00134 <span class="comment">/* Check that image contains frame times */</span>
<a name="l00135"></a>00135 <span class="keywordflow">if</span>(mode!=0 && image-><a class="code" href="structIMG.html#aa2b629a51ca62bcafad0a66d32e1ca8b">end</a>[image-><a class="code" href="structIMG.html#a77605d4aa64b86294590c79e9a761b15">dimt</a>-1]<=0.0) <span class="keywordflow">return</span>(3);
<a name="l00136"></a>00136
<a name="l00137"></a>00137 <span class="comment">/* All time frames */</span>
<a name="l00138"></a>00138 <span class="keywordflow">for</span>(fi=0; fi<image-><a class="code" href="structIMG.html#a77605d4aa64b86294590c79e9a761b15">dimt</a>; fi++) {
<a name="l00139"></a>00139 <span class="keywordflow">if</span>(mode==0) {
<a name="l00140"></a>00140 image-><a class="code" href="structIMG.html#abf0ad6e681d08c3248dbd9837afa9973">decayCorrFactor</a>[fi]=1.0;
<a name="l00141"></a>00141 } <span class="keywordflow">else</span> {
<a name="l00142"></a>00142 dur=image-><a class="code" href="structIMG.html#aa2b629a51ca62bcafad0a66d32e1ca8b">end</a>[fi]-image-><a class="code" href="structIMG.html#a8ff22fc209b6f44ad14341c8644788d2">start</a>[fi];
<a name="l00143"></a>00143 <span class="keywordflow">if</span>(image-><a class="code" href="structIMG.html#aa2b629a51ca62bcafad0a66d32e1ca8b">end</a>[fi]>0.0) {
<a name="l00144"></a>00144 lambda=hl2lambda(image-><a class="code" href="structIMG.html#ac9c048a9dc8205b22518b05486d8030b">isotopeHalflife</a>); <span class="keywordflow">if</span>(lambda<0.0) <span class="keywordflow">return</span>(2);
<a name="l00145"></a>00145 cf=hlLambda2factor_float(lambda, image-><a class="code" href="structIMG.html#a8ff22fc209b6f44ad14341c8644788d2">start</a>[fi], dur);
<a name="l00146"></a>00146 image-><a class="code" href="structIMG.html#abf0ad6e681d08c3248dbd9837afa9973">decayCorrFactor</a>[fi]=cf;
<a name="l00147"></a>00147 }
<a name="l00148"></a>00148 }
<a name="l00149"></a>00149 } <span class="comment">/* next frame */</span>
<a name="l00150"></a>00150 image-><a class="code" href="structIMG.html#a6ce801dea67ec8224e8cfc9aebb8a909">decayCorrected</a>=mode;
<a name="l00151"></a>00151 <span class="keywordflow">return</span>(0);
<a name="l00152"></a>00152 }
<a name="l00153"></a>00153 <span class="comment">/*****************************************************************************/</span>
<a name="l00154"></a>00154
<a name="l00155"></a>00155 <span class="comment">/*****************************************************************************/</span>
<a name="l00156"></a>00156
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