An Investigation of the Effect of Gamma Rays Emitted by Patients Undergoing Radionuclide Bone Scintigraphy in Computed Radiography during X-ray Mammography Examination

For convenience of outpatients, mammographies of outpatients are often taken after the injection of a radionuclide. In this study, we investigated the effects of gamma rays emitted by a patient onto imaging plates (IPs). We used a flat container filled with 99mTc solution as a planar source to irrad...

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Veröffentlicht in:Japanese Journal of Radiological Technology 2010/03/20, Vol.66(3), pp.193-200
Hauptverfasser: Kamigiri, Akira, Nagasawa, Naoki, Yamaji, Masami, Nakamura, Mikako, Ito, Morihiro, Nakanishi, Satoshi, Kitano, Tokio
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container_end_page 200
container_issue 3
container_start_page 193
container_title Japanese Journal of Radiological Technology
container_volume 66
creator Kamigiri, Akira
Nagasawa, Naoki
Yamaji, Masami
Nakamura, Mikako
Ito, Morihiro
Nakanishi, Satoshi
Kitano, Tokio
description For convenience of outpatients, mammographies of outpatients are often taken after the injection of a radionuclide. In this study, we investigated the effects of gamma rays emitted by a patient onto imaging plates (IPs). We used a flat container filled with 99mTc solution as a planar source to irradiate gamma rays onto IPs. We changed irradiation times on each IP, and took radiographies of an ACR-specified 156 model phantom and AGH-D210F phantom. We evaluated radiography images, using visual evaluation, and profile curves, histograms, and CNR and RMS granularities analyses. The results indicated that the depiction ability of a fibrous part began to fall when the irradiation time exceeded 3 minutes. With an increase in irradiation time, an increase in pixel value and RMS granularity value and a decrease in CNR value were observed. In conclusion, IP exposed by gamma rays influenced the evaluation of phantom images.
doi_str_mv 10.6009/jjrt.66.193
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source MEDLINE; EZB-FREE-00999 freely available EZB journals
subjects Bone and Bones - diagnostic imaging
bone scintigraphy
Gamma Rays
imaging plate (IP)
Mammography
Phantoms, Imaging
Radionuclide Imaging
Tomography, X-Ray Computed
title An Investigation of the Effect of Gamma Rays Emitted by Patients Undergoing Radionuclide Bone Scintigraphy in Computed Radiography during X-ray Mammography Examination
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