High-pitch non-gated scans on the second and third generation dual-source CT scanners: comparison of coronary image quality

Cheng Ting Lin, Linda Chi Hang Chu, Stefan Loy Zimmerman, Elliot K. Fishman

Research output: Contribution to journalArticle

Abstract

Objective: To examine differences in image quality of the coronary arteries when performing high-pitch non-electrocardiography (ECG)-gated scans on the second-generation (2G) and third-generation (3G) dual-source CT scanners. Methods: We retrospectively examined patients with high-pitch non-ECG-gated CT angiography (CTA) of the chest or chest/abdomen/pelvis. Outpatient scans from 59 patients in the 3G high-pitch group and 53 patients in the 2G high-pitch group were included. Two blinded cardiac imagers independently scored the coronary image quality using a 4-point Likert scale (from completely diagnostic to completely non-diagnostic) and evaluated the presence of coronary artery disease. Results: Diagnostic image quality of the coronaries in high-pitch CTA exams using 3G scanner was improved compared to 2G scanner, both on a per-vessel basis (45–94% versus 23–86%) and on a per-study basis (34% versus 14%). The 3G group showed a statistically significant improvement in image quality when evaluating the left main coronary, right coronary, and overall coronary arteries. Coronary artery disease was detected in 65% of high-pitch scans. Radiation doses in terms of CTDIvol and DLP were lower for 3G high-pitch scans (7.5 mGy and 491 mGy∗cm) compared to 2G high-pitch scans (14.8 mGy and 911 mGy∗cm). Conclusions: We found a higher proportion of diagnostic image quality of the coronary arteries in high-pitch non-ECG-gated CTA exams using a 3G dual-source CT scanner, compared to 2G. In scans with diagnostic image quality, underlying coronary artery disease may be confidently diagnosed and should prompt considerations for further management in the appropriate clinical setting.

Original languageEnglish (US)
Pages (from-to)45-49
Number of pages5
JournalClinical Imaging
Volume59
Issue number1
DOIs
StatePublished - Jan 2020

Fingerprint

Coronary Artery Disease
Coronary Vessels
Thorax
Pelvis
Abdomen
Outpatients
Radiation
Computed Tomography Angiography

Keywords

  • Cardiovascular
  • Coronary artery disease
  • Dual-source computed tomography
  • High-pitch mode
  • Non-gated computed tomography angiography

ASJC Scopus subject areas

  • Radiology Nuclear Medicine and imaging

Cite this

High-pitch non-gated scans on the second and third generation dual-source CT scanners : comparison of coronary image quality. / Lin, Cheng Ting; Chu, Linda Chi Hang; Zimmerman, Stefan Loy; Fishman, Elliot K.

In: Clinical Imaging, Vol. 59, No. 1, 01.2020, p. 45-49.

Research output: Contribution to journalArticle

@article{2572816f9243478bae6f18d4a53cf416,
title = "High-pitch non-gated scans on the second and third generation dual-source CT scanners: comparison of coronary image quality",
abstract = "Objective: To examine differences in image quality of the coronary arteries when performing high-pitch non-electrocardiography (ECG)-gated scans on the second-generation (2G) and third-generation (3G) dual-source CT scanners. Methods: We retrospectively examined patients with high-pitch non-ECG-gated CT angiography (CTA) of the chest or chest/abdomen/pelvis. Outpatient scans from 59 patients in the 3G high-pitch group and 53 patients in the 2G high-pitch group were included. Two blinded cardiac imagers independently scored the coronary image quality using a 4-point Likert scale (from completely diagnostic to completely non-diagnostic) and evaluated the presence of coronary artery disease. Results: Diagnostic image quality of the coronaries in high-pitch CTA exams using 3G scanner was improved compared to 2G scanner, both on a per-vessel basis (45–94{\%} versus 23–86{\%}) and on a per-study basis (34{\%} versus 14{\%}). The 3G group showed a statistically significant improvement in image quality when evaluating the left main coronary, right coronary, and overall coronary arteries. Coronary artery disease was detected in 65{\%} of high-pitch scans. Radiation doses in terms of CTDIvol and DLP were lower for 3G high-pitch scans (7.5 mGy and 491 mGy∗cm) compared to 2G high-pitch scans (14.8 mGy and 911 mGy∗cm). Conclusions: We found a higher proportion of diagnostic image quality of the coronary arteries in high-pitch non-ECG-gated CTA exams using a 3G dual-source CT scanner, compared to 2G. In scans with diagnostic image quality, underlying coronary artery disease may be confidently diagnosed and should prompt considerations for further management in the appropriate clinical setting.",
keywords = "Cardiovascular, Coronary artery disease, Dual-source computed tomography, High-pitch mode, Non-gated computed tomography angiography",
author = "Lin, {Cheng Ting} and Chu, {Linda Chi Hang} and Zimmerman, {Stefan Loy} and Fishman, {Elliot K.}",
year = "2020",
month = "1",
doi = "10.1016/j.clinimag.2019.09.008",
language = "English (US)",
volume = "59",
pages = "45--49",
journal = "Clinical Imaging",
issn = "0899-7071",
publisher = "Elsevier Inc.",
number = "1",

}

TY - JOUR

T1 - High-pitch non-gated scans on the second and third generation dual-source CT scanners

T2 - comparison of coronary image quality

AU - Lin, Cheng Ting

AU - Chu, Linda Chi Hang

AU - Zimmerman, Stefan Loy

AU - Fishman, Elliot K.

PY - 2020/1

Y1 - 2020/1

N2 - Objective: To examine differences in image quality of the coronary arteries when performing high-pitch non-electrocardiography (ECG)-gated scans on the second-generation (2G) and third-generation (3G) dual-source CT scanners. Methods: We retrospectively examined patients with high-pitch non-ECG-gated CT angiography (CTA) of the chest or chest/abdomen/pelvis. Outpatient scans from 59 patients in the 3G high-pitch group and 53 patients in the 2G high-pitch group were included. Two blinded cardiac imagers independently scored the coronary image quality using a 4-point Likert scale (from completely diagnostic to completely non-diagnostic) and evaluated the presence of coronary artery disease. Results: Diagnostic image quality of the coronaries in high-pitch CTA exams using 3G scanner was improved compared to 2G scanner, both on a per-vessel basis (45–94% versus 23–86%) and on a per-study basis (34% versus 14%). The 3G group showed a statistically significant improvement in image quality when evaluating the left main coronary, right coronary, and overall coronary arteries. Coronary artery disease was detected in 65% of high-pitch scans. Radiation doses in terms of CTDIvol and DLP were lower for 3G high-pitch scans (7.5 mGy and 491 mGy∗cm) compared to 2G high-pitch scans (14.8 mGy and 911 mGy∗cm). Conclusions: We found a higher proportion of diagnostic image quality of the coronary arteries in high-pitch non-ECG-gated CTA exams using a 3G dual-source CT scanner, compared to 2G. In scans with diagnostic image quality, underlying coronary artery disease may be confidently diagnosed and should prompt considerations for further management in the appropriate clinical setting.

AB - Objective: To examine differences in image quality of the coronary arteries when performing high-pitch non-electrocardiography (ECG)-gated scans on the second-generation (2G) and third-generation (3G) dual-source CT scanners. Methods: We retrospectively examined patients with high-pitch non-ECG-gated CT angiography (CTA) of the chest or chest/abdomen/pelvis. Outpatient scans from 59 patients in the 3G high-pitch group and 53 patients in the 2G high-pitch group were included. Two blinded cardiac imagers independently scored the coronary image quality using a 4-point Likert scale (from completely diagnostic to completely non-diagnostic) and evaluated the presence of coronary artery disease. Results: Diagnostic image quality of the coronaries in high-pitch CTA exams using 3G scanner was improved compared to 2G scanner, both on a per-vessel basis (45–94% versus 23–86%) and on a per-study basis (34% versus 14%). The 3G group showed a statistically significant improvement in image quality when evaluating the left main coronary, right coronary, and overall coronary arteries. Coronary artery disease was detected in 65% of high-pitch scans. Radiation doses in terms of CTDIvol and DLP were lower for 3G high-pitch scans (7.5 mGy and 491 mGy∗cm) compared to 2G high-pitch scans (14.8 mGy and 911 mGy∗cm). Conclusions: We found a higher proportion of diagnostic image quality of the coronary arteries in high-pitch non-ECG-gated CTA exams using a 3G dual-source CT scanner, compared to 2G. In scans with diagnostic image quality, underlying coronary artery disease may be confidently diagnosed and should prompt considerations for further management in the appropriate clinical setting.

KW - Cardiovascular

KW - Coronary artery disease

KW - Dual-source computed tomography

KW - High-pitch mode

KW - Non-gated computed tomography angiography

UR - http://www.scopus.com/inward/record.url?scp=85075202802&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85075202802&partnerID=8YFLogxK

U2 - 10.1016/j.clinimag.2019.09.008

DO - 10.1016/j.clinimag.2019.09.008

M3 - Article

C2 - 31760276

AN - SCOPUS:85075202802

VL - 59

SP - 45

EP - 49

JO - Clinical Imaging

JF - Clinical Imaging

SN - 0899-7071

IS - 1

ER -