𝔖 Bobbio Scriptorium
✦   LIBER   ✦

Variations in measured vessel diameters using Coronary Measurement System

✍ Scribed by Robert, Normand ;Yaffe, Martin J. ;Langer, Anatoly

Publisher
John Wiley and Sons
Year
1996
Tongue
English
Weight
572 KB
Volume
39
Category
Article
ISSN
0098-6569

No coin nor oath required. For personal study only.

✦ Synopsis

The Coronary Measurement System (CMS, MEDIS, Leiden, Netherlands) is a film-based QCA system that allows the user to vary the intensity of the light source which illuminates the film, thereby changing the brightness of the image viewed by the digitizing video camera. We found that significant variations in calibration factor (mm/pixel) and measured diameter can occur as a result of variations in either of these intensities. We calculated the variability of the measured diameters for a range of light intensities used for vessel measurement and for calibration. The root mean square deviations in estimated vessel diameter for simulated vessels having actual diameters of 2.03, 2.56, 3.03, and 3.55 mm were 0.13, 0.13, 0.13, and 0.11 mm, respectively, while the ranges (maximum-minimum estimates) were 0.47,0.45,0.47, and 0.36 min, respectively. These results show that while mean errors due to changes in brightness are small, there is the potential for larger errors for certain combinations of light intensities.

πŸ“œ SIMILAR VOLUMES

Limits to the accuracy of vessel diamete
Limits to the accuracy of vessel diameter measurement in MR angiography
✍ Romhild M. Hoogeveen; Chris J. G. Bakker; Max A. Viergever πŸ“‚ Article πŸ“… 1998 πŸ› John Wiley and Sons 🌐 English βš– 1010 KB

This work addresses the fundamental limits imposed by the MRI process on the accuracy with which vessel diameters and cross-sectional areas can be derived from time-of-flight (TOF) and phase-contrast (PC) MR source images. By means of simulations and in vitro experiments, it is demonstrated that, ev

Intra- and interstudy reproducibility of
Intra- and interstudy reproducibility of coronary artery diameter measurements in magnetic resonance coronary angiography
✍ Jennifer Keegan; Paramate Horkaew; Tim J. Buchanan; Trevor S. Smart; Guang-Zhong πŸ“‚ Article πŸ“… 2004 πŸ› John Wiley and Sons 🌐 English βš– 281 KB

## Abstract ## Purpose To determine the intra‐ and interstudy reproducibility of right coronary artery diameter assessment using serial magnetic resonance (MR) coronary angiography. ## Materials and Methods Two‐dimensional (2D) navigator‐gated segmented fast low angle shot (FLASH) images of the