Kido S, Ikezoe J, Takeuchi N, Kondoh H, Johkoh T, Kohno N, Tomiyama N, Yamagami H, Naito H, Arisawa J
Department of Radiology, Osaka University Medical School, Japan.
Radiology. 1994 Jul;192(1):171-6. doi: 10.1148/radiology.192.1.8208932.
To evaluate the reliability of film-digitized radiography in detection of subtle interstitial lung abnormalities.
The differences in interpretation of conventional screen-film (SF) and film-digitized (FD) radiographs obtained in 80 patients were studied. Forty patients with subtle interstitial lung abnormalities and 40 patients with no lung abnormalities were selected. SF radiographs of all patients were digitized (spatial resolution, 0.175 mm; 2,000 x 2,000 pixels; 10 bits). Five chest radiologists and five residents evaluated the images with a five-level scale of confidence. Results were evaluated with receiver operating characteristic techniques.
For the entire group, no statistically significant differences in performance were found between SF and FD radiographs. Chest radiologists performed better on SF radiographs (P = .003). For residents, no statistically significant differences were observed between the modalities.
FD radiographs may be inadequate compared with SF radiographs in the diagnosis of subtle interstitial lung abnormalities.
评估数字化胸片在检测细微间质性肺异常方面的可靠性。
研究了80例患者的传统屏-片（SF）胸片和数字化胸片（FD）解读结果的差异。选取了40例有细微间质性肺异常的患者和40例无肺部异常的患者。所有患者的SF胸片均被数字化（空间分辨率0.175毫米；2000×2000像素；10位）。5位胸部放射科医生和5位住院医师采用五级置信度量表对图像进行评估。采用受试者操作特征技术对结果进行评估。
对于整个研究组，SF胸片和FD胸片在性能上未发现统计学显著差异。胸部放射科医生对SF胸片的诊断表现更好（P = 0.003）。对于住院医师，两种检查方式之间未观察到统计学显著差异。
在诊断细微间质性肺异常方面，与SF胸片相比，FD胸片可能不够充分。
