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The Medical Radiology and Radiation Safety journal ISSN 1024-6177 was founded in January 1956 (before December 30, 1993 it was entitled Medical Radiology, ISSN 0025-8334). In 2018, the journal received Online ISSN: 2618-9615 and was registered as an electronic online publication in Roskomnadzor on March 29, 2018. It publishes original research articles which cover questions of radiobiology, radiation medicine, radiation safety, radiation therapy, nuclear medicine and scientific reviews. In general the journal has more than 30 headings and it is of interest for specialists working in thefields of medicine¸ radiation biology, epidemiology, medical physics and technology. Since July 01, 2008 the journal has been published by State Research Center - Burnasyan Federal Medical Biophysical Center of Federal Medical Biological Agency. The founder from 1956 to the present time is the Ministry of Health of the Russian Federation, and from 2008 to the present time is the Federal Medical Biological Agency.
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Medical Radiology and Radiation Safety. 2016. Vol. 61. No. 6. P. 64-67
NUCLEAR MEDICINE
N.E. Kosykh1, S.Z. Savin1, T.P. Potapova2
The Use of Textural Analysis for Assessment of Differences Between Metastatic and Non-Metastatic Zones on Planar Bone Scintigrams
1. Computer Center of Far-Eastern Branch, Russian Academy of Sciences, Khabarovsk, Russia, e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it. ; 2. Far-Eastern State Medical University, Khabarovsk, Russia
Abstract
Purpose: Study of metastatic images’ textural characteristics on planar scintigrams of skeleton.
Material and methods: The study involves computer analysis program for automatic assessment of skeletal metastases which is based on image recognition principles and is capable of expert analysis. The program’s functionality includes skeleton image segmentation, calculation of textural, histogrammic and morphometric parameters, creation of learning sample, dividing segmented foci to pathological and non-pathological by means of classifying function based on support vector machine. The study is based on planar scintigraphy data assessment of 168 patients with disseminated breast cancer. Computer automated analysis was used to distinguish pathological (metastatic) from physiological (non-metastatic) radiopharmaceutical hyperfixation foci in which Haralick’s textural features were determined: autocorrelation, contrast, forth feature and heterogeneity. On anterior view scintigrams, in a segmented skeleton, 8 zones were selected: scull, accessory sinuses of the nose, spine, sternum, thorax, pelvis, large joints and long cortical bones. On posterior view scintigrams 6 zones were selected: scull, spine, thorax, large joints and long cortical bones. Weighted means were calculated for each zone. Derived values for pathological and non-pathological hyperfixation foci were paralleled with calculation of Students’ criteria.
Results: In most skeletal zones textural Haralick’s features prevail in pathological hyperfixation foci over similar values in physiological hyperfixation foci. Differences by all 5 features between pathological and physiological radiopharmaceutical hyperfixation foci on frontal scintigrams were found in sternal and pelvic zones. On posterior scintigrams they were found only in pelvic zones. Most commonly in pathological hyperfixation foci (both posterior and anterior scintigrams) prevalence of contrast was found in comparison with similar features of physiological hyperfixation foci.
Conclusion: Results of our research show possibility of Haralick’s textures application for differential diagnostics of metastatic and non-metastatic foci on planar bone scintigrams by means of computer automated analysis.
Key words: automated computer analysis, image recognition, planar scintigrams, hyperfixation zone, radiopharmaceutical, histograms, image brightness
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For citation: Kosykh NE, Savin SZ, Potapova TP. The Use of Textural Analysis for Assessment of Differences between Metastatic and Non-Metastatic Zones on Planar Bone Scintigrams. 2016;61(6):64-7. Russian.
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