CIRS 012A乳腺模體，CIRS 012A乳腺X射線組織等效模體描述
CIRS 012A乳腺模體包括4,5和6厘米厚的組織等效模型。每個(gè)幻影包含相同的嵌入細(xì)節(jié)（見地圖011A）。每個(gè)模體的腺體含量分別為50％，30％和20％。還包括phototimer補(bǔ)償板，使厚度范圍從0.5厘米至7厘米，腺體含量為30％，50％和70％。
一個(gè)補(bǔ)償板包含用于評(píng)估圖像質(zhì)量的嵌入細(xì)節(jié)。包括一個(gè)重型泡沫內(nèi)襯手提箱。
CIRS樹脂材料模仿一系列乳房組織的光子衰減系數(shù)。被模仿的人乳房的平均元素組成基于Hammerstein報(bào)道的脂肪和腺體組織的單個(gè)元素組成。
衰減系數(shù)通過使用JHHubbell的“混合規(guī)則”和光子質(zhì)量衰減和能量吸收系數(shù)表來計(jì)算。
CIRS 012A乳腺模體產(chǎn)品特點(diǎn)：
在不同程度的厚度和腺體情況下評(píng)估圖像質(zhì)量
為輻射劑量提供準(zhǔn)確可靠的測試
確保一致的診斷有用圖像的生產(chǎn)
The CIRS mammography research set includes tissue equivalent phantoms 4, 5 and 6 cm thick. Each phantom contains identical embedded details (see map 011A). The glandular content of each phantom is 50%, 30%, and 20% respectively. Also included are phototimer compensation plates enabling a range of thickness from 0.5 cm to 7 cm with a glandular content of 30%, 50% and 70%.
One compensation plate contains embedded details for evaluation of image quality. A heavy duty foam lined carrying case are included.
CIRS resin material mimics the photon attenuation coefficients of a range of breast tissues. Average elemental composition of the human breast being mimicked is based in the individual elemental composition of adipose and glandular tissue reported by Hammerstein.
Attenuation coefficients are calculated by using the "mixture rule" and the Photon Mass Attenuation and Energy Absorption Coefficient Table of J.H. Hubbell.
Enable evaluation of image quality under varying degrees of thickness and glandularity
Provides accurate reliable test for radiation dose
Ensures consistent production of diagnostically useful images
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