Ⅱ. Methods: 2010년9월~2011년3월까지 진폐증 환자 50명(남자50명, 평균연령 67±7세)를 대상으로 각각 12bit와 15bit 단순 흉부 영상을 비교하였다. 동일한 환자와 장비는(Digital Diagnostic 1.0. 필립스. 네덜란드)를 사용하였다. Detector(TRIXELL, Indirect method) 관전압(125KVP), Automatic Exposure Control(AEC), Density, Detector Sensitivity, Focus, Filter, SID등 모든 조건은 같게 하였다. 비교 판독 분석은 5Mega pixel(2048*2560) 판독용 monitor 사용하였다. 영상의학과 전문의 3명이 James J. Vucich (Burean of Radiological Health) 흉부 X선 사진평가표에 의하여 물리학적 방법 100점(Contrast35, Sharpness30, Sampling20, Noise15)과 해부학적 방법 100점(skeletal system10, Respiratory system 15, Cardiovascular system30, Mediastinal system30, Muscular system15)로 평가하였다. 통계학적 방법은 t-TEST사용하여 두 변수를 검증하였다.

영어 번역문

Ⅱ. Methods:

We chose as subjects of research 50 patients with pneumoconiosis (50 men; average age, 67 ± 7 years) and compared simple 12- and 15-bit chest X-ray images of them from September 2010 to March 2011. We used the identical device (Digital Diagnostic 1.0., Phillips, Netherlands) for the relevant patients. We adjusted the followings to X-ray under the identical condition: detector (TRIXELL, indirect method) tube voltage (125 KVP), automatic exposure control (AEC), density, detector sensitivity, focus, filter, SID, etc. We used a monitor for decoding 5 mega pixel (2048*2560) to conduct a comparative analysis. 3 specialists in the department of diagnostic radiology evaluated the relevant images by the physical method (100 points; contrast 35, sharpness 30, sampling 20, and noise 15) and by the anatomical method (100 points; skeletal system 10, respiratory system 15, cardiovascular system 30, mediastinal system 30, and muscular system 15), based on chest X-ray photograph score card. We adopted as a statistical method t-Test to verify two variables physical and anatomical methods.