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MAMMOGRAPHY APPARATUS, IMAGE PROCESSOR AND CALCULATION METHOD OF MAMMARY GLANDULAR DOSE
MAMMOGRAPHY APPARATUS, IMAGE PROCESSOR AND CALCULATION METHOD OF MAMMARY GLANDULAR DOSE
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机译：乳腺腺体剂量的乳腺摄影设备，图像处理器和计算方法
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摘要
PROBLEM TO BE SOLVED: To calculate a mammary glandular dose reflecting a three-dimensional distribution of the mammary gland in the mamma.;SOLUTION: The mammography apparatus 1 includes: an image pickup section 3 for capturing the image of the mamma of a subject through X-rays; an image generation section 23 for generating data of an image based on an output of an image pickup section 3; a mamma region extraction section 27 for extracting the mamma region from the generated image; a mammary gland content rate calculation section 29 for calculating a mammary gland content rate based on imaging conditions and a pixel value for every pixel of the extracted mamma region; an AGD (Average Glandular Dose) calculation section 31 for calculating an AGD based on a skin surface dose, a conversion coefficient under the mammary gland content rate of 50%, a correction coefficient for every pixel to a deviation from the mammary gland content rate 50%, and a coefficient to materials of a positive electrode and of a quality filter for every pixel in the mamma region; and an average value calculation section 33 for calculating each AGD-weighted average value defining each calculated mammary gland content rate as weight.;COPYRIGHT: (C)2009,JPO&INPIT
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