The Principle of Digital Subtraction Angiography and Radiological Protection

Recent improvements in x-ray technology have greatly contributed to the advancement of diagnostic imaging. Fluoroscopically guided neurointerventional procedures with digital subtraction angiography (DSA) are being performed with increasing frequency as the treatment of choice for a variety of neurovascular diseases. Radiation-induced skin injuries can occur after extended fluoroscopic exposure times, and the injuries have recently been reported. In this article, measured radiation doses at the surface of Rando Phantom with Skin Dose Monitor, and estimated and measured entrance skin doses in patients underwent neurointerventional procedures are reported as well as means of reducing radiation doses absorbed by patients and personnel to avoid occurrence of radiation-induced injuries.

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A LabVIEW Platform for Preclinical Imaging Using Digital Subtraction Angiography and Micro-CT

Journal of Medical Engineering ◽

10.1155/2013/581617 ◽

2013 ◽

Vol 2013 ◽

pp. 1-13 ◽

Cited By ~ 1

Author(s):

Cristian T. Badea ◽

Laurence W. Hedlund ◽

G. Allan Johnson

Keyword(s):

Digital Subtraction Angiography ◽

Functional Imaging ◽

Imaging System ◽

Micro Ct ◽

Digital Subtraction ◽

X Ray ◽

Retrospective Gating ◽

Dual Source ◽

Labview Platform ◽

And Control

CT and digital subtraction angiography (DSA) are ubiquitous in the clinic. Their preclinical equivalents are valuable imaging methods for studying disease models and treatment. We have developed a dual source/detector X-ray imaging system that we have used for both micro-CT and DSA studies in rodents. The control of such a complex imaging system requires substantial software development for which we use the graphical language LabVIEW (National Instruments, Austin, TX, USA). This paper focuses on a LabVIEW platform that we have developed to enable anatomical and functional imaging with micro-CT and DSA. Our LabVIEW applications integrate and control all the elements of our system including a dual source/detector X-ray system, a mechanical ventilator, a physiological monitor, and a power microinjector for the vascular delivery of X-ray contrast agents. Various applications allow cardiac- and respiratory-gated acquisitions for both DSA and micro-CT studies. Our results illustrate the application of DSA for cardiopulmonary studies and vascular imaging of the liver and coronary arteries. We also show how DSA can be used for functional imaging of the kidney. Finally, the power of 4D micro-CT imaging using both prospective and retrospective gating is shown for cardiac imaging.

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The Use of Gadolinium Chelates for X-Ray Digital Subtraction Angiography

Investigative Radiology ◽

10.1097/00004424-200105000-00003 ◽

2001 ◽

Vol 36 (5) ◽

pp. 257-265 ◽

Cited By ~ 17

Author(s):

HANS-JOACHIM WAGNER ◽

MARC KALINOWSKI ◽

KLAUS-JOCHEN KLOSE ◽

AND HEIKO ALFKE

Keyword(s):

Digital Subtraction Angiography ◽

Digital Subtraction ◽

X Ray ◽

Gadolinium Chelates

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X-ray Digital Subtraction Angiography to Magnetic Resonance-Digital Subtraction Angiography using Three-Dimensional TRICKS

Investigative Radiology ◽

10.1097/00004424-199809000-00004 ◽

1998 ◽

Vol 33 (9) ◽

pp. 496-505 ◽

Cited By ~ 13

Author(s):

CHARLES A. MISTRETTA ◽

THOMAS M. GRIST

Keyword(s):

Magnetic Resonance ◽

Digital Subtraction Angiography ◽

Three Dimensional ◽

Digital Subtraction ◽

X Ray

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A tracking system to calculate patient skin dose in real-time during neurointerventional procedures using a biplane x-ray imaging system

Medical Physics ◽

10.1118/1.4960368 ◽

2016 ◽

Vol 43 (9) ◽

pp. 5131-5144 ◽

Cited By ~ 26

Author(s):

V. K. Rana ◽

S. Rudin ◽

D. R. Bednarek

Keyword(s):

Real Time ◽

Imaging System ◽

Tracking System ◽

Skin Dose ◽

X Ray ◽

X Ray Imaging ◽

Neurointerventional Procedures

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SPOT REGION OF INTEREST IMAGING: A NOVEL FUNCTIONALITY AIMED AT X-RAY DOSE REDUCTION IN NEUROINTERVENTIONAL PROCEDURES

Radiation Protection Dosimetry ◽

10.1093/rpd/ncz290 ◽

2020 ◽

Vol 188 (3) ◽

pp. 322-331

Author(s):

Ljubisa Borota ◽

Andreas Patz

Keyword(s):

Dose Reduction ◽

Region Of Interest ◽

Skin Dose ◽

X Ray ◽

Dose Area Product ◽

Dose Saving ◽

Area Product ◽

Anatomical Area ◽

Neurointerventional Procedures ◽

Peak Skin Dose

Abstract Aim of the study: The aim of this study was to describe a new functionality aimed at X-ray dose reduction, referred to as spot region of interest (Spot ROI) and to compare it with existing dose-saving functionalities, spot fluoroscopy (Spot F), and conventional collimation (CC). Material and methods: Dose area product, air kerma, and peak skin dose were measured for Spot ROI, Spot F, and CC in three different fields of view (FOVs) 20 × 20 cm, 15 × 15 cm, and 11 × 11 cm using an anthropomorphic head phantom RS-230T. The exposure sequence was 5 min of pulsed fluoroscopy (7.5 pulses per s) followed by 7× digital subtraction angiography (DSA) runs with 30 frames per DSA acquisition (3 fps × 10 s). The collimation in Spot F and CC was adjusted such that the size of the anatomical area exposed was as large as the Spot ROI area in each FOV. Results: The results for all FOVs were the following: for the fluoroscopy, all measured parameters for Spot ROI and Spot F were lower than corresponding values for CC. For DSA and DSA plus fluoroscopy, all measured parameters for Spot ROI were lower than corresponding parameters for Spot F and CC. Conclusion: Spot ROI is a promising dose-saving technology that can be applied in fluoroscopy and acquisition. The biggest benefit of Spot ROI is its ability to keep the entire FOV information always visible.

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