Recommended Conferences

Clinical Pharmacy and Pharmacology

Paris, France
 

Effect of acquisition technique on radiation dose and image quality in multidetector row computed tomography coronary angiography with submillimeter collimation

Author(s): Gerber TC, Stratmann BP, Kuzo RS, Kantor B, Morin RL

Abstract

Rationale and objectives: We sought to examine effects of tube voltage and current on radiation dose and image quality for minimally invasive coronary angiography with a 16-slice multidetector row computed tomography (MDCT) scanner.

Materials and methods: We scanned the phantom used in the American College of Radiology Computed Tomography Accreditation Program at tube voltages of 80 and 120 kVp at 550, 650, and 750 mAseff, with and without a reduction in radiation dose by electrocardiographically (ECG) controlled tube current modulation (ECG pulsing).

Results: Without ECG pulsing, the effective dose was 3 to 13 mSv. On average, a 50% increase in tube voltage led to increased radiation dose (215%), contrast-to-noise ratio (150%), and decreased image noise (-48%). On average, a 17% increase in mAseff led to increased radiation dose (17%) and contrast-to-noise ratio (4%) and decreased image noise (-9%). Dose reduction by ECG pulsing (simulated heart rate, 70 beats per minute) was 28%. With ECG pulsing, noise in images reconstructed during ventricular systole was double that in images reconstructed during ventricular diastole.

Conclusions: These quantitative findings about the relationships among scan acquisition parameters, radiation dose, and image quality have practical implications for using ECG pulsing to reduce radiation doses in MDCT coronary angiography.

Similar Articles

Physiological basis of clinically used coronary hemodynamic indices

Author(s): Spaan JA, Piek JJ, Hoffman JI, Siebes M

Pressure-flow relations in coronary circulation

Author(s): Hoffman JI, Spaan JA

Pathophysiology of coronary artery disease

Author(s): Libby P, Theroux P

Multicentric inflammation in epicardial coronary arteries of patients dying of acute myocardial infarction

Author(s): Spagnoli LG, Bonanno E, Mauriello A, Palmieri G, Partenzi A, et al.

Chest pain relief by nitroglycerin does not predict active coronary artery disease

Author(s): Henrikson CA, Howell EE, Bush DE, Miles JS, Meininger GR, et al.

Exercise-induced ST depression in the diagnosis of coronary artery disease

Author(s): Gianrossi R, Detrano R, Mulvihill D, Lehmann K, Dubach P, et al.

Effect of myocardial ischemia on cardiac troponin I and T

Author(s): Carlson RJ, Navone A, McConnell JP, Burritt M, Castle MC, et al.

Prevalence and determinants of troponin T elevation in the general population

Author(s): Wallace TW, Abdullah SM, Drazner MH, Das SR, Khera A, et al.

Utility of myocardial perfusion imaging in patients with low-risk treadmill scores

Author(s): Poornima IG, Miller TD, Christian TF, Hodge DO, Bailey KR, et al.

Magnetic resonance spectroscopy in myocardial disease

Author(s): Hudsmith LE, Neubauer S

Accuracy of MSCT coronary angiography with 64-slice technology: first experience

Author(s): Leschka S, Alkadhi H, Plass A, Desbiolles L, Grünenfelder J, et al.

Characteristics of coronary plaques before angiographic progression determined by Multi-Slice CT

Author(s): Leber AW, von Ziegler F, Becker A, Becker CR, Reiser M, et al.

Influence of heart rate on the diagnostic accuracy of dual-source computed tomography coronary angiography

Author(s): Ropers U, Ropers D, Pflederer T, Anders K, Kuettner A, et al.

Radiation dose in computed tomography of the heart

Author(s): Morin RL, Gerber TC, McCollough CH

Radiation exposure during cardiac CT: effective doses at multi-detector row CT and electron-beam CT

Author(s): Hunold P, Vogt FM, Schmermund A, Debatin JF, Kerkhoff G, et al.

Prognostic value of dobutamine stress myocardial contrast perfusion echocardiography

Author(s): Tsutsui JM, Elhendy A, Anderson JR, Xie F, McGrain AC, et al.

N Engl J Med 331: 489-495

Author(s): Serruys PW, de Jaegere P, Kiemeneij F, Macaya C, Rutsch W, et al.

Major clinical events after coronary stenting

Author(s): Sutton JM, Ellis SG, Roubin GS, Pinkerton CA, King SB 3rd, et al.

Percutaneous coronary intervention versus coronary-artery bypass grafting for severe coronary artery disease

Author(s): Serruys PW, Morice MC, Kappetein AP, Colombo A, Holmes DR, et al.

Coronary revascularization in context

Author(s): Lange RA, Hillis LD

Coronary artery disease in Saudi Arabia

Author(s): Al-Nozha MM, Arafah MR, Al-Mazrou YY, Al-Maatouq MA, Khan NB, et al.

Diabetes mellitus in Saudi Arabia

Author(s): Al-Nozha MM, Al-Maatouq MA, Al-Mazrou YY, Al-Harthi SS, Arafah MR, et al.

Obesity in Saudi Arabia

Author(s): Al-Nozha MM, Al-Mazrou YY, Al-Maatouq MA, Arafah MR, Khalil MZ, et al.

Metabolic syndrome in Saudi Arabia

Author(s): Al-Nozha M, Al-Khadra A, Arafah MR, Al-Maatouq MA, Khalil MZ, et al.

Hypertension in Saudi Arabia

Author(s): Al-Nozha MM, Abdullah M, Arafah MR, Khalil MZ, Khan NB, et al.

Hyperlipidemia in Saudi Arabia

Author(s): Al-Nozha MM, Arafah MR, Al-Maatouq MA, Khalil MZ, Khan NB, et al.

Interaction between fatness and fitness on CVD risk factors in Asian youth

Author(s): Jekal Y, Kim ES, Im JA, Park JH, Lee MK, et al.

Body fatness and clustering of cardiovascular disease risk factors in Portuguese children and adolescents

Author(s): Ribeiro JC, Guerra S, Oliveira J, Andersen LB, Duarte JA, et al.

Changes in secondary prevention of coronary artery disease in the post-discharge period over the decade 1997-2007

Author(s): Pajak A, Jankowski P, Kawecka-Jaszcz K, Surowiec S, Wolfshaut R, et al.

Secondary prevention through cardiac rehabilitation: from knowledge to implementation

Author(s): Piepoli MF, Corrá U, Benzer W, Bjarnason-Wehrens B, Dendale P, et al.

Secondary prevention of coronary artery disease in hospital practice over the decade 1996-2006

Author(s): Jankowski P, Kawecka-Jaszcz K, Pajak A, Surowiec S, Wolfshaut R, et al.