gross tumor volume


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Related to gross tumor volume: Clinical Target Volume

gross tumor volume

The demonstrable extent of a tumor seen or felt with standard examination techniques. The gross tumor volume is used in radiation oncology as the basis for initial estimates of the extent of a tumor that will undergo treatment with external beam radiation or brachytherapy.
See also: volume
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References in periodicals archive ?
Presented in this work is the training and validation of a DTKNN classifier algorithm based on the use of 3D texture features derived from PET/CT scans of patients with lung carcinoma, in order to estimate the contours of the gross tumor volume. The DTKNN differentiates itself from other methods in that it utilizes machine learning to classify voxels as being either normal or abnormal by relying on the textural patterns from both PET and CT.
Correlation of Computed Tomography-Defined Gross Tumor Volume (GTV), Microscopy-Defined GTV, and Microscopy-Defined GTV Plus Inflammation * Micro-GTV + Specimen CT-GTV Micro-GTV Inflammation 1 2.63 2.47 4.63 2 6.07 3.14 5.72 3 8.81 4.33 6.01 4 21.21 17.53 20.64 5a 32.67 19.58 28.36 5b 33.23 20.88 29.53 5c 46.02 22.01 31.31 Difference Difference Between CT-GTV Between CT-GTV and Micro-GTV Specimen and Micro-GTV % Difference + Inflammation 1 0.16 6 -2 2 2.93 93 0.35 3 4.48 103 2.8 4 3.68 21 0.57 5a 13.09 67 4.31 5b 12.35 59 3.7 5c 24.01 109 14.71 Specimen % Difference 1 -76 2 6 3 32 4 3 5a 13 5b 11 5c 32 * CT-GTV indicates area of tumor as outlined on CT scan; Micro-GTV, area of tumor under microscope; Micro-GTV + inflammation, area of tumor plus surrounding inflammation under microscope.
(d) Gold standard of gross tumor volume, drawn on the fused PET-CT image (red line).
The internal target volume (ITV) was defined as the combination of the gross tumor volume (GTV) delineated on ten phases of the 4DCT scans under the pulmonary windows.
The gross tumor volume (GTV) for the boost was identified in the CT (supported by contrast media) utilizing the FDG-uptake.