Individualized Delay for Abdominal Computed Tomography Angiography Bolus-Tracking Based on Sequential Monitoring
Autor: | Ahmed F. Halaweish, Yong S Lee, Joel G. Fletcher, Nikkole M. Weber, Vighnesh Suresh, Ralf Gutjahr, Eric E. Williamson, Bernhard Schmidt, Terri J. Vrtiska, Cynthia H. McCollough |
---|---|
Rok vydání: | 2019 |
Předmět: |
Male
Radiography Abdominal Time Factors Computed Tomography Angiography Image quality media_common.quotation_subject Contrast Media chemistry.chemical_element Iodine 030218 nuclear medicine & medical imaging 03 medical and health sciences 0302 clinical medicine Iodinated contrast Hounsfield scale Abdomen medicine Humans Contrast (vision) Radiology Nuclear Medicine and imaging Bolus tracking Aorta Aged Retrospective Studies Computed tomography angiography media_common medicine.diagnostic_test business.industry chemistry Angiography Nuclear medicine business 030217 neurology & neurosurgery |
Zdroj: | Journal of Computer Assisted Tomography. 43:612-618 |
ISSN: | 0363-8715 |
Popis: | OBJECTIVE The aim of this study was to determine if computed tomography (CT) angiography using an individualized transition delay (CTA-ID) would facilitate reductions in injection rate and iodine dose. METHODS The CTA-ID was performed in 20 patients with routine injection rate and iodine dose; 20 patients with injection rate lowered by 1 mL/s; and 40 patients with injection rate lowered by 1 mL/s with 29% less iodine. Routine CTAs in the same or size-matched patients served as controls. Diagnostic image quality and intra-arterial CT numbers were assessed. RESULTS The median transition delay between aortic threshold and CTA-ID image acquisition was significantly longer than with conventional bolus tracking (mean increase, 13.3 seconds; P < 0.0001), with image quality being the same or better. Intra-arterial CT numbers were 200 Hounsfield units or greater for 80 of 80 CTA-ID, but not for 6 of 49 (12%) internal control or for 11 of 80 (14%) size-matched control patients. CONCLUSION The CTA-ID bolus-tracking software alters transition delays to permit diagnostic CTA examinations despite slower injection rate and less iodine. |
Databáze: | OpenAIRE |
Externí odkaz: |