Related Experiment Video
Updated: Feb 14, 2026

Lung CT Segmentation to Identify Consolidations and Ground Glass Areas for Quantitative Assesment of SARS-CoV Pneumonia
Published on: December 19, 2020
Usefulness of model-based iterative reconstruction in semi-automatic volumetry for ground-glass nodules at
Shuki Maruyama1, Yasuhiro Fukushima2, Yuta Miyamae3
1Division of Clinical Radiology Service, Kyoto University Hospital, 54 Kawaharacho, Syogoin, Sakyo-ku, Kyoto, Kyoto, 606-8507, Japan. smaruym@kuhp.kyoto-u.ac.jp.
Abstract:
This study aimed to investigate the effects of parameter presets of the forward projected model-based iterative reconstruction solution (FIRST) on the accuracy of pulmonary nodule volume measurement. A torso phantom with simulated nodules [diameter: 5, 8, 10, and 12 mm; computed tomography (CT) density: - 630 HU] was scanned with a multi-detector CT at tube currents of 10 mA (ultra-low-dose: UL-dose) and 270 mA (standard-dose: Std-dose). Images were reconstructed with filtered back projection [FBP; standard (Std-FBP), ultra-low-dose (UL-FBP)], FIRST Lung (UL-Lung), and FIRST Body (UL-Body), and analyzed with a semi-automatic software. The error in the volume measurement was determined. The errors with UL-Lung and UL-Body were smaller than that with UL-FBP. The smallest error was 5.8% ± 0.3 for the 12-mm nodule with UL-Body (middle lung). Our results indicated that FIRST Body would be superior to FIRST Lung in terms of accuracy of nodule measurement with UL-dose CT.
More Related Videos
Related Concept Videos
Imaging Studies I: CT and MRI
Description of the Procedures
Computed Tomography (CT) scan:
Computed Tomography (CT) scans use X-ray technology to generate detailed images of bones, organs, and tissues. During the scan, the patient lies on a moving table...
Imaging Studies for Cardiovascular System V: CT
Automatic Processing and Automatic Social Behavior
The Looking Glass Self
Bioavailability Study Design: Single Versus Multiple Dose Studies
Imaging Studies for Cardiovascular System VI: Calcium -Scoring CT

