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Hi Asra,</div>
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Are you simulating a CBCT like scanner? If yes here a 120 kVp X-ray spectra covering a uniform rectangular field of view, which I built few years ago, to change the irradiation field you need to change irradiation angle and the source to FOV center distance.<br>
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Hope it helps,<br>
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Mahdjoub,</div>
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STL, MO, USA<br>
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<div id="divRplyFwdMsg" dir="ltr"><font style="font-size:11pt" face="Calibri, sans-serif" color="#000000"><b>De :</b> Gate-users <gate-users-bounces@lists.opengatecollaboration.org> de la part de Asra Talebi <asra.talebi@modares.ac.ir><br>
<b>Envoyé :</b> samedi 3 août 2019 17:20<br>
<b>À :</b> gate-users@lists.opengatecollaboration.org <gate-users@lists.opengatecollaboration.org><br>
<b>Objet :</b> [Gate-users] a source with rectangular cross section</font>
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<p style="margin-top: 0px; margin-bottom: 0px;"><span style="white-space:pre-wrap"><span>Does anyone else know how to simulate a source with rectangular cross section without using beam collimation.</span><span></span></span><br>
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<pre style="white-space:pre-wrap">Thanks & Regards</pre>
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<sub><span style="font-size:12pt">asra sadat talebi</span></sub><br>
<span style="font-size:12pt">PhD Scholar</span><br>
<span style="font-size:12pt">Tarbiat Modares University</span><br>
<span style="font-size:12pt">Department of medical physics</span><br>
<span style="font-size:12pt">Tehran - Iran</span><br>
<span style="font-size:12pt">E-mail address: </span><span style="color:rgb(0,111,201); font-family:Calibri,Helvetica,sans-serif,EmojiFont,"Apple Color Emoji","Segoe UI Emoji",NotoColorEmoji,"Segoe UI Symbol","Android Emoji",EmojiSymbols,EmojiFont,"Apple Color Emoji","Segoe UI Emoji",NotoColorEmoji,"Segoe UI Symbol","Android Emoji",EmojiSymbols; font-size:12pt">asra.talebi@modares.ac.ir</span></p>
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<span style="color:rgb(0,111,201); font-family:Calibri,Helvetica,sans-serif,EmojiFont,"Apple Color Emoji","Segoe UI Emoji",NotoColorEmoji,"Segoe UI Symbol","Android Emoji",EmojiSymbols,EmojiFont,"Apple Color Emoji","Segoe UI Emoji",NotoColorEmoji,"Segoe UI Symbol","Android Emoji",EmojiSymbols; font-size:16px"><span style="color:rgb(0,111,201); font-family:Calibri,Helvetica,sans-serif,EmojiFont,"Apple Color Emoji","Segoe UI Emoji",NotoColorEmoji,"Segoe UI Symbol","Android Emoji",EmojiSymbols,EmojiFont,"Apple Color Emoji","Segoe UI Emoji",NotoColorEmoji,"Segoe UI Symbol","Android Emoji",EmojiSymbols; font-size:12pt">asra.talebi@yahoo.com</span><br>
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