Bachelor`s Degree Programme in Radiography Department of Technology Faculty of Health and Technology, Metropolitan University College, Sigurdsgade 26, 2200, Copenhagen N., Denmark,
Insights Imaging. 2013 Aug;4(4):491-7. doi: 10.1007/s13244-013-0260-x. Epub 2013 Jun 14.
To compare computed tomographic colonography (CTC) performance of four trained radiographers with the CTC performance of two experienced radiologists.
Four radiographers and two radiologists interpreted 87 cases with 40 polyps ≥6 mm. Sensitivity, specificity, and positive predictive value (PPV) were assessed on a per-patient basis. On a per-polyp basis, sensitivity was calculated according to the respective size categories (polyps ≥6 mm as well as polyps ≥10 mm).
Overall per-patient sensitivity for polyps ≥6 mm was 76.2 % (95 % CI 61.4-91.0) and 76.2 % (95 % CI 61.7-90.6), for the radiographers and radiologists, respectively. Overall per-patient specificity for polyps ≥6 mm were 81.4 % (95 % CI 73.7-89.2) and 81.1 % (95 % CI 73.8-88.3) for the radiographers and the radiologists, respectively. For the radiographers, overall per-polyp sensitivity was 60.3 % (95 % CI 50.3-70.3) and 60.7 % (95 % CI 42.2-79.2) for polyps ≥6 mm and ≥10 mm, respectively. For the radiologists, overall per polyp sensitivity was 59.2 % (95 % CI 46.4-72.0) and 69.0 % (95 % CI 48.1-89.6) for polyps ≥6 mm and ≥10 mm, respectively.
Radiographers with training in CT colonographic evaluation achieved sensitivity and specificity in polyp detection comparable with that of experienced radiologists.
• The diagnostic accuracy of trained radiographers was comparable to that of experienced radiologists. • The use of radiographers in reading CTC examinations is acceptable, however radiologists would still be necessary for the evaluation of extracolonic findings. • Skilled non-radiologists may play a vital role as a second reader of intraluminal findings or by performing quality control of examinations before patient dismissal.
比较四位经过培训的放射技师与两位经验丰富的放射科医生在计算机断层结肠成像（CTC）检查中的表现。
四位放射技师和两位放射科医生对 87 例 40 枚≥6mm 的息肉进行了检测。基于每位患者和每枚息肉分别评估敏感性、特异性和阳性预测值（PPV）。基于每个息肉的大小类别（≥6mm 和≥10mm 的息肉）计算敏感性。
总体而言，≥6mm 息肉的每位患者的敏感性分别为 76.2%（95%CI 61.4-91.0）和 76.2%（95%CI 61.7-90.6），放射技师和放射科医生的特异性分别为 81.4%（95%CI 73.7-89.2）和 81.1%（95%CI 73.8-88.3）。对于放射技师而言，≥6mm 息肉的总体每枚息肉敏感性为 60.3%（95%CI 50.3-70.3）和 60.7%（95%CI 42.2-79.2），≥10mm 息肉的敏感性分别为 60.3%（95%CI 50.3-70.3）和 60.7%（95%CI 42.2-79.2）。对于放射科医生而言，≥6mm 息肉的总体每枚息肉敏感性为 59.2%（95%CI 46.4-72.0）和 69.0%（95%CI 48.1-89.6），≥10mm 息肉的敏感性分别为 59.2%（95%CI 46.4-72.0）和 69.0%（95%CI 48.1-89.6）。
经过 CT 结肠成像评估培训的放射技师在检测息肉方面的敏感性和特异性与经验丰富的放射科医生相当。
经过培训的放射技师的诊断准确性与经验丰富的放射科医生相当。
接受 CTC 检查的放射技师的使用是可以接受的，但对于结外表现的评估仍需要放射科医生。
熟练的非放射科医生可能在作为腔内表现的第二读片者或在患者离开前进行检查质量控制方面发挥重要作用。
