Impact of digital imaging on radiation doses to the patient during X-ray examination of the urinary tract

2005 ◽  
Vol 46 (6) ◽  
pp. 657-661 ◽  
Author(s):  
B. Sjöholm ◽  
H. Geijer ◽  
J. Persliden
Keyword(s):  
Dose Reduction ◽  
Intravenous Urography ◽  
Radiation Doses ◽  
Flat Panel ◽  
Storage Phosphor ◽  
X Ray ◽  
Dose Area Product ◽  
Flat Panel Detector ◽  
Before And After ◽  
Phosphor Plates

Purpose: To compare radiation doses given to patients undergoing IVU (intravenous urography) before and after digitalization of our X-ray department. Material and Methods: IVU examinations were monitored with dose area product meters before and after the X-ray department changed to digital techniques. The first step was a change from film-screen to storage phosphor plates, while the second step involved changing to a flat panel detector. Forty-two patients were included for the film-screen situation, 69 when using the storage phosphor plates, and 70 using the flat panel detector. Results: A dose reduction from 41.8 Gycm2 to 31.5 Gycm2 was achieved with the first step when the film-screen system was replaced with storage phosphor plates. A further reduction to 12.1 Gycm2 was achieved using the flat panel detector. Conclusion: The introduction of the flat panel detectors made a considerable dose reduction possible.

Reducing dose in urography while maintaining image quality—a comparison of storage phosphor plates and a flat-panel detector

2005 ◽  
Vol 16 (1) ◽  
pp. 221-226 ◽  
Author(s):  
Margareta Jansson ◽  
Håkan Geijer ◽  
Jan Persliden ◽  
Torbjörn Andersson
Keyword(s):  
Image Quality ◽  
Flat Panel ◽  
Storage Phosphor ◽  
Flat Panel Detector ◽  
Phosphor Plates

Analysis of Patients’ X-ray Exposure in 146 Percutaneous Radiologic Gastrostomies

2017 ◽  
Vol 189 (09) ◽  
pp. 820-827 ◽  
Author(s):  
Tim-Ole Petersen ◽  
Martin Reinhardt ◽  
Jochen Fuchs ◽  
Dieter Gosch ◽  
Alexey Surov ◽  
...  
Keyword(s):  
Cone Beam Ct ◽  
Image Intensifier ◽  
Flat Panel ◽  
Flat Detector ◽  
Dose Length Product ◽  
X Ray ◽  
Dose Area Product ◽  
Flat Panel Detector ◽  
Significant Prolongation ◽  
Area Product

Purpose Analysis of patient´s X-ray exposure during percutaneous radiologic gastrostomies (PRG) in a larger population. Materials and Methods Data of primary successful PRG-procedures, performed between 2004 and 2015 in 146 patients, were analyzed regarding the exposition to X-ray. Dose-area-product (DAP), dose-length-product (DLP) respectively, and fluoroscopy time (FT) were correlated with the used x-ray systems (Flatpanel Detector (FD) vs. Image Itensifier (BV)) and the necessity for periprocedural placement of a nasogastric tube. Additionally, the effective X-ray dose for PRG placement using fluoroscopy (DL), computed tomography (CT), and cone beam CT (CBCT) was estimated using a conversion factor. Results The median DFP of PRG-placements under fluoroscopy was 163 cGy*cm2 (flat panel detector systems: 155 cGy*cm2; X-ray image intensifier: 175 cGy*cm2). The median DLZ was 2.2 min. Intraprocedural placement of a naso- or orogastric probe (n = 68) resulted in a significant prolongation of the median DLZ to 2.5 min versus 2 min in patients with an already existing probe. In addition, dose values were analyzed in smaller samples of patients in which the PRG was placed under CBCT (n = 7, median DFP = 2635 cGy*cm2), or using CT (n = 4, median DLP = 657 mGy*cm). Estimates of the median DFP and DLP showed effective doses of 0.3 mSv for DL-assisted placements (flat panel detector 0.3 mSv, X-ray image converter 0.4 mSv), 7.9 mSv using a CBCT – flat detector, and 9.9 mSv using CT. This corresponds to a factor 26 of DL versus CBCT, or a factor 33 of DL versus CT. Conclusion In order to minimize X-ray exposure during PRG-procedures for patients and staff, fluoroscopically-guided interventions should employ flat detector systems with short transmittance sequences in low dose mode and with slow image frequency. Series recordings can be dispensed with. The intraprocedural placement of a naso- or orogastric probe significantly extends FT, but has little effect on the overall dose of the intervention. Due to the significantly higher X-ray exposure, the use of a CBCT as well as PRG-placements using CT should be limited to clinically absolutely necessary exceptions with strict indication. Key Points  Citation Format

Noninvasive patient tracker mask for spinal 3D navigation: does the required large-volume 3D scan involve a considerably increased radiation exposure?

2020 ◽  
Vol 33 (6) ◽  
pp. 838-844
Author(s):  
Jan-Helge Klingler ◽  
Ulrich Hubbe ◽  
Christoph Scholz ◽  
Florian Volz ◽  
Marc Hohenhaus ◽  
...  
Keyword(s):  
Radiation Exposure ◽  
Image Data ◽  
3D Image ◽  
Flat Panel ◽  
3D Navigation ◽  
Data Set ◽  
Dose Area Product ◽  
Flat Panel Detector ◽  
3D Scan ◽  
Area Product

OBJECTIVEIntraoperative 3D imaging and navigation is increasingly used for minimally invasive spine surgery. A novel, noninvasive patient tracker that is adhered as a mask on the skin for 3D navigation necessitates a larger intraoperative 3D image set for appropriate referencing. This enlarged 3D image data set can be acquired by a state-of-the-art 3D C-arm device that is equipped with a large flat-panel detector. However, the presumably associated higher radiation exposure to the patient has essentially not yet been investigated and is therefore the objective of this study.METHODSPatients were retrospectively included if a thoracolumbar 3D scan was performed intraoperatively between 2016 and 2019 using a 3D C-arm with a large 30 × 30–cm flat-panel detector (3D scan volume 4096 cm3) or a 3D C-arm with a smaller 20 × 20–cm flat-panel detector (3D scan volume 2097 cm3), and the dose area product was available for the 3D scan. Additionally, the fluoroscopy time and the number of fluoroscopic images per 3D scan, as well as the BMI of the patients, were recorded.RESULTSThe authors compared 62 intraoperative thoracolumbar 3D scans using the 3D C-arm with a large flat-panel detector and 12 3D scans using the 3D C-arm with a small flat-panel detector. Overall, the 3D C-arm with a large flat-panel detector required more fluoroscopic images per scan (mean 389.0 ± 8.4 vs 117.0 ± 4.6, p < 0.0001), leading to a significantly higher dose area product (mean 1028.6 ± 767.9 vs 457.1 ± 118.9 cGy × cm2, p = 0.0044).CONCLUSIONSThe novel, noninvasive patient tracker mask facilitates intraoperative 3D navigation while eliminating the need for an additional skin incision with detachment of the autochthonous muscles. However, the use of this patient tracker mask requires a larger intraoperative 3D image data set for accurate registration, resulting in a 2.25 times higher radiation exposure to the patient. The use of the patient tracker mask should thus be based on an individual decision, especially taking into considering the radiation exposure and extent of instrumentation.

Chest Radiography with a Flat-Panel Detector: Image Quality with Dose Reduction after Copper Filtration

Radiology ◽  
2005 ◽  
Vol 237 (2) ◽  
pp. 691-700 ◽  
Author(s):  
Okka W. Hamer ◽  
Claude B. Sirlin ◽  
Michael Strotzer ◽  
Ingitha Borisch ◽  
Niels Zorger ◽  
...  
Keyword(s):  
Image Quality ◽  
Dose Reduction ◽  
Chest Radiography ◽  
Flat Panel ◽  
Flat Panel Detector

Performance of mobile digital X-ray fluoroscopy using a novel flat panel detector for intraoperative use

2015 ◽  
Vol 23 (3) ◽  
pp. 365-372
Author(s):  
Chang-Won Jeong ◽  
Jong-Hyun Ryu ◽  
Su-Chong Joo ◽  
Hong-Young Jun ◽  
Dong-Woon Heo ◽  
...  
Keyword(s):  
Flat Panel ◽  
X Ray ◽  
Flat Panel Detector

scholarly journals Digital Mammography Device for Mobile Mammography Complex

2021 ◽  
pp. 62-69
Author(s):  
A. G. Larin ◽  
A. R. Dabagov
Keyword(s):  
Digital Mammography ◽  
Flat Panel ◽  
X Ray ◽  
Flat Panel Detector ◽  
Mobile Mammography

The results of the development of a mammographic unit with a digital flat-panel detector designed for for installation in a mobile medical X-ray room are presented.The mammographic unit with a digital flat-panel detector is designed for screening and other specialized mammographic examinations, provides the ability to perform full-format raster (using a screening raster) mammography, X-ray of the armpits.

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