Cardiology 2013. Part II.

Notes: Turakhia, Mintu P

Hoang, Donald D

Xu, Xiangyan

Frayne, Susan

Schmitt, Susan

Yang, Felix

Phibbs, Ciaran S

Than, Claire T

Wang, Paul J

Heidenreich, Paul A

eng

Comparative Study

Research Support, Non-U.S. Gov’t

Research Support, U.S. Gov’t, Non-P.H.S.

2012/12/15 06:00

Am Heart J. 2013 Jan;165(1):93-101.e1. doi: 10.1016/j.ahj.2012.10.010. Epub 2012 Nov 20.

URL: http://www.ncbi.nlm.nih.gov/pubmed/23237139

Author Address: Veterans Affairs Palo Alto Health Care System, Palo Alto, CA; Stanford University School of Medicine, Palo Alto, CA 94304, USA. mintu@stanford.edu

 

 

Reference Type:  Journal Article

Record Number: 1075Author: Ubeda, C., Vano, E., Gonzalez, L. and Miranda, P.

Year: 2013

Title: Influence of the antiscatter grid on dose and image quality in pediatric interventional cardiology X-ray systems

Journal: Catheter Cardiovasc Interv

Volume: 82

Issue: 1

Pages: 51-7

Date: Jul 1

Short Title: Influence of the antiscatter grid on dose and image quality in pediatric interventional cardiology X-ray systems

Alternate Journal: Catheterization and cardiovascular interventions : official journal of the Society for Cardiac Angiography & Interventions

ISSN: 1522-726X (Electronic)

1522-1946 (Linking)

DOI: 10.1002/ccd.24602

Accession Number: 22899572

Keywords: Age Factors

Body Weight

Cardiac Catheterization/*instrumentation

Cardiology/*instrumentation

Child, Preschool

Equipment Design

Humans

Infant

Infant, Newborn

Patient Selection

Pediatrics/*instrumentation

Predictive Value of Tests

*Radiation Dosage

*Radiographic Image Interpretation, Computer-Assisted

Radiography, Interventional/*instrumentation

Scattering, Radiation

Signal-To-Noise Ratio

Thoracic Wall/anatomy & histology/radiography

Abstract: OBJECTIVE: To present a methodology and experimental results to assess the influence, in terms of dose and image quality, of the antiscatter grid (AG) in a pediatric cardiology X-ray system. METHOD: Entrance surface air kerma and image quality, using a test object and different added thicknesses of polymethyl methacrylate (PMMA), for three different acquisition protocols, were measured with and without the AG, for fluoroscopy and cine modes. The image quality parameters, signal-to-noise ratio (SNR), high-contrast spatial resolution (HCSR) and two figures of merit (FOM) were evaluated. RESULTS: The average bucky factor values measured during this experiment were 1.99, 2.49, 2.85, and 3.30, respectively for 4, 8, 12, and 16 cm of PMMA. SNR variations do not appear to be relevant when removing the AG. However, the use of AG improves HCSR significantly. Imaging the test object with 4 cm of PMMA seems appropriate without the AG, but for 8 cm (equivalent to chest thicknesses of 12 cm) and greater thicknesses, a good image quality would require the use of AG. CONCLUSIONS: The AG should not be used for neonates and very young children with chest thicknesses equal to or less than 6 cm and weight less that 6 kg.

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