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<meta name="description" content="CTsim - The Open-Source Computed Tomography Simulator">
<meta name="keywords" content="ctsim, computed tomography, ct, open source, scientific software, simulation, c++, online simulation, medical imaging">
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<TITLE>CTSim's Online Computed Tomography Simulator</TITLE>
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<H1>
<a href="http://www.ctsim.org">CTSim's</a>
Online Computed Tomography Simulator</H1>
Reasonable defaults have been filled into this form. For detailed explanations of the
parameters on this form, please visit CTSim's online <a href="http://www.ctsim.org/manual/ctsim_contents.html">manual</a>.<br>

<FORM action="@cgibinurl@/ctsim.cgi" method="POST">
<table border=1 cellpadding="5" bgcolor="#FFFFFF">
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<h3>Select Image and Size</h3>
<font size="-1">
Phantom Name:<br>
<INPUT type="radio" name="Phantom_Name" value="herman" checked>G.T. Herman<br>
<INPUT type="radio" name="Phantom_Name" value="shepp-logan">Shepp-Logan<br>
<INPUT type="radio" name="Phantom_Name" value="unit-pulse">Unit Pulse<br>
<p>
Image Size:<br>
Width: <input type="text" name="Phantom_Nx" size="4" value="128"><br>
Height: <input type="text" name="Phantom_Ny" size="4" value="128"><br>
<p>
View Ratio: <input type="text" name="Phantom_ViewRatio" size="4" value="1.01">
<p>
Number of Samples<br>per pixel: <input type="text" name="Phantom_NSample" size="2" value="2"><br>
<p>
Display Window:<br>
Minimum: <input type="text" name="Disp_Min" size=5 value="auto"><br>
Maximum: <input type="text" name="Disp_Max" size=5 value="auto"><br>
<p> 
<!--MPI Supercomputing:<br>
<INPUT type="radio" name="MPI" value="yes">Yes (Multiple CPUs)<br>
<INPUT type="radio" name="MPI" value="no" checked>No (Single CPU)<br>
</td>
-->
</font>
<td valign="top">
<h3>Simulate X-Ray acquistion</h3>
<font size=-1>
Geometry:<br>
<INPUT type="radio" name="PJ_Geometry" value="parallel" checked>Parallel<br>
<INPUT type="radio" name="PJ_Geometry" value="equiangular">Equiangular<br>
<INPUT type="radio" name="PJ_Geometry" value="equilinear">Equilinear<br>
<p>
Number of Detectors: <input type="text" name="PJ_NDet" size="4" value="200"><p>
Number of Rotations: <input type="text" name="PJ_NRot" size="4" value="200"><p>
Focal Length: <input type="text" name="PJ_FocalLength" size="4" value="2.0"><p>
Scan Ratio: <input type="text" name="PJ_ScanRatio" size="4" value="1.0"><p>
Number of Rays<br>(samples) per detector: <input type="text" name="PJ_NRay" size="2" value="2"><p>
Rotation Angle<br>as a fraction of a cricle: <input type="text" name="PJ_RotAngle" size="3" value="1.0"><br>
</td></font>
<td valign="top">
<H3>Image Reconstruction</H3>
<font size=-1>
Filter Method:<br>
<input type="radio" name="IR_FilterMethod" value="convolution" checked>Convolution<br>
<input type="radio" name="IR_FilterMethod" value="fourier">Fourier<br>
<input type="radio" name="IR_FilterMethod" value="fourier_table">Fourier Table<br>
<input type="radio" name="IR_FilterMethod" value="rfftw">FFT<br>
<p>
Zeropad (applies to<br> Fourier & FFT):
<input type="text" name="IR_Zeropad" size="1" value="1"><br>
<p>
Interpolation:<br>
<input type="radio" name="IR_Interp" value="nearest">Nearest Neighbor<br>
<input type="radio" name="IR_Interp" value="linear" checked>Linear<br>
<input type="radio" name="IR_Interp" value="cubic">Cubic<br>
<p>
Filter:<br>
<input type="radio" name="IR_Filter" value="abs_bandlimit" checked>Bandlimit<br>
<input type="radio" name="IR_Filter" value="abs_cos">Cosine<br>
<input type="radio" name="IR_Filter" value="abs_hamming">Hamming<br>
<input type="radio" name="IR_Filter" value="abs_hanning">Hanning<br>
<input type="radio" name="IR_Filter" value="abs_sinc">Sinc<br>
<input type="radio" name="IR_Filter" value="shepp">Shepp-Logan
<p>
Hamming alpha factor (0.0-1.0): <input type="text" name="IR_Filter_Param" size="3" value="1.0"><p>
Backprojection Method:<br>
<input type="radio" name="IR_Backproj" value="trig">Trig<br>
<input type="radio" name="IR_Backproj" value="table">Trig Table<br>
<input type="radio" name="IR_Backproj" value="diff">Difference<br>
<input type="radio" name="IR_Backproj" value="idiff" checked>Difference (integer math)<br>
</td></tr>
</font>
</table>
<p>
<input type="submit" value="Simulate"><input type="reset" value="Set Fields to Default">
<br>
After clicking the <b>Simulate</b> button, it will take a few seconds to a few minutes for your results to appear depending
upon the simulation parameters that you have chosen.
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