Ryoichi Kato MD, Presenter: Nothing to Disclose

Shigetaka Suzuki, Abstract Co-Author: Nothing to Disclose

Ryota Hanaoka, Abstract Co-Author: Nothing to Disclose

Kazuhiro Murayama MD, Abstract Co-Author: Nothing to Disclose

Hirofumi Anno MD, Abstract Co-Author: Nothing to Disclose

Kazuhiro Katada MD, Abstract Co-Author: Consultant, Toshiba Corporation

To evaluate the clinical application of 320-row ADCT for the examination of pediatric patients who are unable to hold their breath or control movement and to visually assess the artifacts in images of patients with and without motion.

Scanning was performed using a 320-row ADCT (0.5-mm slice thickness, 0.35 s/rot). The subjects were 39 scans of 21 patients (5 years of age or less, mean age: 19 months). They were classified into two groups: patients without motion (27 scans: 9 head, 5 chest, 13 abdomen) and patients with motion (12 scans: 3 head, 4 chest, 5 abdomen). For patients with motion, scanning was performed while physicians held the patient on the couch. Motion artifacts were visually assessed by 3 radiologists using a 4-grade scale: 1) image interpretation not possible due to artifacts, 2) detailed interpretation not possible due to artifacts, 3) interpretation possible despite the presence of artifacts, and 4) image almost entirely free of artifacts.

The mean scores were 3.6 (head: 3.9, chest: 3.0, abdomen: 3.6) in the group without motion and 3.3 (head: 3.8, chest: 2.5, abdomen: 3.4) in the group with motion. Artifacts in images of the head and abdomen, which are less affected by respiratory or pulsatile movement, tended to be less severe in the group without motion, but the results were nearly equivalent in the group with motion, and images with fewer artifacts could be obtained. Images of the chest are affected by respiratory and pulsatile movement, and artifacts in the chest tended to be more severe in all images, but there was only one image that could not be interpreted in the group with motion.

The scan time in ADCT is significantly shorter than that in multi-slice helical CT (MSCT), making it possible to obtain images with fewer artifacts in pediatric patients who cannot control movement. ADCT should therefore prove useful for imaging pediatric patients.

The scan time in ADCT is significantly shorter than that in MSCT, making it possible to obtain images with fewer artifacts in pediatric patients. ADCT is useful for imaging pediatric patients.

Kato, R, Suzuki, S, Hanaoka, R, Murayama, K, Anno, H, Katada, K, Early Clinical Experience with 320-Row Area Detector CT (ADCT): Pediatric Applications.  Radiological Society of North America 2008 Scientific Assembly and Annual Meeting, February 18 - February 20, 2008 ,Chicago IL. http://archive.rsna.org/2008/6022575.html