Varied tube potential with constant effective dose at lumbar spine radiography using a flat-panel digital detector

2005 ◽  
Vol 114 (1-3) ◽  
pp. 240-245 ◽  
Author(s):  
Håkan Geijer ◽  
Jan Persliden
Keyword(s):  
Lumbar Spine ◽  
Effective Dose ◽  
Flat Panel ◽  
Spine Radiography ◽  
Digital Detector ◽  
Tube Potential

scholarly journals Lumbar spine radiographs — is it time for widespread adoption of posteroanterior projection?

2019 ◽  
Vol 92 (1103) ◽  
pp. 20190386
Author(s):  
Christopher Green ◽  
Guru Karnati ◽  
Katharine Thomson ◽  
Ashok Subramanian
Keyword(s):  
Lumbar Spine ◽  
Image Quality ◽  
Effective Dose ◽  
Acquisition Time ◽  
Reference Image ◽  
Patient Study ◽  
Spine Radiography ◽  
Widespread Adoption ◽  
Spine Radiograph ◽  
Spine Radiographs

Objective: Phantom studies and a prior patient study have shown up to 53% effective dose reduction when lumbar spine radiographs are acquired posteroanterior (PA) instead of anteroposterior (AP). Since November 2017, Taunton and Somerset NHS Foundation Trust has acquired all standing lumbar spine radiographs PA. The aim of this study was to locally evaluate dose and image quality in both projections and survey current UK practice. Methods: 80 outpatients having a standing lumbar spine radiograph (40 AP; 40 PA) had their dose–area product recorded at a constant KV and focus film distance. Effective dose was calculated using PCXMC software. Each blinded radiograph was scored against an optimal reference image using European Guidelines criteria. The data were analyzed using Mann–Whitney U tests and linear regression. Eighty radiologists nationally were sent an anonymous survey to establish their current practice. Results: A lumbar spine radiograph acquired PA instead of AP reduced effective dose by 41% (p < 0.001) with no difference in image quality (p = 0.9). 21 radiologists completed our survey and only 1 NHS Trust is currently using PA. Conclusion: PA lumbar spine radiography reduces patient radiation exposure with no affect on image quality, acquisition time or cost. The majority of NHS Trusts nationally are still using AP and it is time to standardize to PA. Advances in knowledge: This patient study provides further good evidence of how reduction in exposure to ionizing radiation can be achieved in lumbar spine radiography and more widespread adoption of PA protocol could improve patient safety.

Lumbar Spine Radiography: Digital Flat-Panel Detector versus Screen-Film and Storage-Phosphor Systems in Monkeys as a Pediatric Model

Radiology ◽  
2003 ◽  
Vol 229 (1) ◽  
pp. 140-144 ◽  
Author(s):  
Karl Ludwig ◽  
Kathrin Ahlers ◽  
Dag Wormanns ◽  
Michael Freund ◽  
Thomas M. Bernhardt ◽  
...  
Keyword(s):  
Lumbar Spine ◽  
Flat Panel ◽  
Storage Phosphor ◽  
Spine Radiography ◽  
Flat Panel Detector ◽  
And Storage

scholarly journals Comparison of anteroposterior and posteroanterior projection in lumbar spine radiography

2018 ◽  
Vol 52 (4) ◽  
pp. 468-474 ◽  
Author(s):  
Erna Alukic ◽  
Damijan Skrk ◽  
Nejc Mekis
Keyword(s):  
Lumbar Spine ◽  
Image Quality ◽  
Effective Dose ◽  
Field Size ◽  
Second Phase ◽  
Image Field ◽  
Spine Radiography ◽  
Study Results ◽  
Significant Difference ◽  
Phase Data

Abstract Background The aim of the study was to compare patient radiation dose and image quality in planar lumbar spine radiography using the PA and AP projection in a large variety of patients of both sexes and different sizes. Patients and methods In the first phase data of image field size, DAP, effective dose and image quality were gathered for AP and PA projection in lumbar spine imaging of anthropomorphic phantom. In the second phase, data of BMI, image field size, diameter of the patient’s abdomen, DAP, effective dose and image quality were gathered for 100 patients of both sexes who were referred to lumbar spine radiography. The patients were divided into two groups of 50 patients, one of which was imaged using the AP projection while the other the PA projection. Results The study on the phantom showed no statistically significant difference in image field size, DAP and image quality. However, the calculated effective dose in the PA projection was 25% lower compared to AP projection (p =0.008). Measurements on the patients showed no statistically significant difference between the BMI and the image field size. In the PA projection, the thickness of abdomen was 10% (p < 10–3) lower, DAP 27% lower (p = 0.009) and the effective dose 53% (p < 10–3) lower than in AP projection. There was no statistically significant difference in image quality between the AP and the PA projection. Conclusions The study results support the use of the PA projection as the preferred method of choice in planar lumbar spine radiography.

LUMBAR SPINE RADIOGRAPHY: LOWER ORGAN DOSE WITH THE USE OF PA PROJECTION

2019 ◽  
Vol 186 (4) ◽  
pp. 507-512
Author(s):  
Erna Alukić ◽  
Nejc Mekiš
Keyword(s):  
Lumbar Spine ◽  
Effective Dose ◽  
Organ Dose ◽  
Field Size ◽  
Organ Doses ◽  
Dose Area Product ◽  
Spine Radiography ◽  
Spine Imaging ◽  
Significant Difference ◽  
Area Product

Abstract The purpose of the research was to determine the effect of the posteroanterior (PA) patient position in lumbar spine imaging on effective dose and the absorbed organ dose. The study was performed on 100 patients that were referred to the lumbar spine radiography that were divided into two equal groups of 50. Body Mass Index, Dose Area Product (DAP), exposure index (EXI), tube time-current (mAs), image field size and the source-patient distance were acquired for each patient. The entrance surface dose (ESD), the effective dose and the absorbed organ doses were calculated. There was no statistically significant difference in the BMI and EXI between the AP and PA projection. The results showed a significant reduction of ESD by 33% and the effective dose by 53% when the PA projection was used. Furthermore, there was a 64% average reduction of the absorbed organ doses to the selected organs.

Using 100- instead of 120-kVp computed tomography to diagnose pulmonary embolism almost halves the radiation dose with preserved diagnostic quality

2010 ◽  
Vol 51 (3) ◽  
pp. 260-270 ◽  
Author(s):  
Peter Björkdahl ◽  
Ulf Nyman
Keyword(s):  
Computed Tomography ◽  
Pulmonary Embolism ◽  
Image Quality ◽  
Radiation Dose ◽  
Effective Dose ◽  
Ct Number ◽  
Subjective Image Quality ◽  
Diagnostic Quality ◽  
X Ray ◽  
Tube Potential

Background: Concern has been raised regarding the mounting collective radiation doses from computed tomography (CT), increasing the risk of radiation-induced cancers in exposed populations. Purpose: To compare radiation dose and image quality in a chest phantom and in patients for the diagnosis of pulmonary embolism (PE) at 100 and 120 peak kilovoltage (kVp) using 16-multichannel detector computed tomography (MDCT). Material and Methods: A 20-ml syringe containing 12 mg I/ml was scanned in a chest phantom at 100/120 kVp and 25 milliampere seconds (mAs). Consecutive patients underwent 100 kVp ( n = 50) and 120 kVp ( n = 50) 16-MDCT using a “quality reference” effective mAs of 100, 300 mg I/kg, and a 12-s injection duration. Attenuation (CT number), image noise (1 standard deviation), and contrast-to-noise ratio (CNR; fresh clot = 70 HU) of the contrast medium syringe and pulmonary arteries were evaluated on 3-mm-thick slices. Subjective image quality was assessed. Computed tomography dose index (CTDIvol) and dose–length product (DLP) were presented by the CT software, and effective dose was estimated. Results: Mean values in the chest phantom and patients changed as follows when X-ray tube potential decreased from 120 to 100 kVp: attenuation +23% and +40%, noise +38% and +48%, CNR −6% and 0%, and CTDIvol −38% and −40%, respectively. Mean DLP and effective dose in the patients decreased by 42% and 45%, respectively. Subjective image quality was excellent or adequate in 49/48 patients at 100/120 kVp. No patient with a negative CT had any thromboembolism diagnosed during 3-month follow-up. Conclusion: By reducing X-ray tube potential from 120 to 100 kVp, while keeping all other scanning parameters unchanged, the radiation dose to the patient may be almost halved without deterioration of diagnostic quality, which may be of particular benefit in young individuals.

Image quality in conventional lumbar spine radiography

2009 ◽  
Vol 70 (2) ◽  
pp. 357-361 ◽  
Author(s):  
Tilo Niemann ◽  
Clemens Reisinger ◽  
Laura Ruiz-Lopez ◽  
Georg Bongartz
Keyword(s):  
Lumbar Spine ◽  
Image Quality ◽  
Spine Radiography
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