VADETECT | VisionX V4 |
vadetect - detects attached nodules from a whole lung CT scans.
SYNOPSISvadetect [if=] [ib=] [ia=] [oc=] [of=] [om=] [am=] [d=] [k=] [-d] [-v] [-w]
DESCRIPTIONvadetect program detects attached nodules from a whole lung CT scan. Attached nodules include nodules attached to large dense structures, In this context, large dense structures refer to those structures with a size comparable to or larger than the nodule’s diameter. Nodules attached to the pleural surface are the most prevalent of this type. However, nodules may also be attached to other structures such as large vessels, airways and/or the hilum region.
A separate novel detection algorithm is developed for attached nodule types. The algorithm follows the architecture of the isolated nodule detection algorithm but with different components at each stage. In the hypothesis generation stage, a 3D volume occupancy distribution curve centered at every lung contour voxel is generated. The characteristics of these curves are then analyzed to generate nodule candidates. Next, the nodule candidates are passed through successive false positive elimination stages.
For attached nodule detection algorithm, the whole lung CT scan [if=] have to be specified. In addition, the lung mask before [ib=] and after [ia=] the morphological closing operation (if available) can be specified, otherwise the program generates the two masks first. If inital attached nodule candidates file is available, it can be specified using [oc=] option and the program goes straight to false positive reduction stage.
The program outputs potential nodule location (XYZ) including their size in a text file format [of=]. A text format feature matrix for the all nodule candidates or refined isolated nodules can be generated using [am=] and [om=] options respectively. Various debugging options are available. [-v] and [-w] provide different levels of verbose information. In addition, all intermediate files can be stored in a separate directory for debugging using [t=] option.
OPTIONS|
if= |
Original whole lung CT scan | ||
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ib= |
Lung mask before morphological closing operation (if not specified it will be generated inside the program). | ||
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ia= |
Lung mask after morphological closing operation (if not specified it will be generated inside the program). | ||
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[oc=] |
initial attached nodule candidate file(if not specified it will be generated inside the program). | ||
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[om=] |
refined isolated nodules feature matrix file | ||
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[am=] |
all isolated candidates feature matrix file | ||
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[d=] |
consider only nodule candidates with size greater than or equal to [d=] | ||
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[of=] |
attached nodule locations file | ||
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[k=] |
dump all commands to this file | ||
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[-v] |
selects the verbose mode to print information about intermediate results | ||
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[t=] |
directory to store all intermediate files | ||
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[-w] |
very verbose option |
videtect,vdetect
AUTHORAndinet A. Enquobahrie