The use of model-based iterative reconstruction to decrease ED radiation exposure

Gatewood, Medley; Grubish, Lindsay; Busey, Janet M.; Shuman, William P.; Strote, Jared

doi:10.1016/j.ajem.2015.01.010

Cited by 6 publications

(3 citation statements)

References 23 publications

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“…The tube output and current have to be adapted according to the patient's body mass index, with the use of other tools such as automatic tube current modulation or tube output modulation. Iterative reconstruction techniques can also be used, contributing further reductions in radiation exposure by improving image quality (15,16).…”

Section: Technical Parametersmentioning

confidence: 99%

Two-dimensional and three-dimensional imaging of uterus and fallopian tubes in female infertility

Carrascosa

Capuñay

Vallejos

et al. 2016

Fertility and Sterility

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Section: Technical Parametersmentioning

confidence: 99%

Two-dimensional and three-dimensional imaging of uterus and fallopian tubes in female infertility

Carrascosa

Capuñay

Vallejos

et al. 2016

Fertility and Sterility

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“…10 In comparison, IR techniques generated better image quality with reduced image noise at lower radiation doses (though longer reconstruction times) compared with the filtered back projection technique. 9,11 Dose reductions from IR techniques range widely in the available literature, [11][12][13][14] some quoting as high as a 76% reduction in dose. 15 This wide range of dose reduction is partially due to patient body habitus.…”

Section: Introductionmentioning

confidence: 99%

Iterative Model Reconstruction in Lumbar Spine Image Retrieval from Computed Tomography of the Abdomen and Pelvis

Tan

Kuganesan

Buchan

et al. 2021

Hong Kong Journal of Radiology

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Objective: We sought to compare the image quality of iterative model reconstruction (IMR) with statistical iterative reconstruction (SIR) in lumbar spine (L-spine) images reconstructed from computed tomography (CT) image data from examinations of the abdomen and pelvis compared with routine L-spine CT images reconstructed with SIR. Methods: We conducted a retrospective study to compare image noise in L-spine reconstructions using SIR and IMR techniques in consecutive CT abdomen and pelvis (CTAP) examinations, with L-spine CT images reconstructed using SIR. Hounsfield units and their standard deviations in areas of image noise were measured in bone, cerebrospinal fluid (CSF), and lumbar discs. The results of SIR and IMR were compared using paired t tests. The results of CTAP and CT L-spine were compared using the Mann-Whitney U test. A p value <0.05 was considered significant. Qualitative assessment of the bone/CSF, disc/CSF, and disc/bone interface was performed by two readers. Results: IMR generated less image noise than SIR with CTAP and L-spine CT with SIR, particularly on bone windows. There was also significant improvement in the clarity of interfaces between vertebral bodies, discs, epidural fat, and CSF with IMR. The mean radiation dose was much higher for L-spine CT compared with CTAP. Conclusion: IMR is superior to SIR for the image quality of reconstructed lumbar spine images from CTAP. The IMR lumbar spine image from CTAP image data acquired with a lower radiation dose was also shown to be clearer when compared with routine SIR L-spine CT images.

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“…16,17 A computer can be used to create a model and reconstruct images that can reduce radiation by 34% to 42%. 18,19 The downside is that creating a model is computationally difficult and can severely impact the turnaround time of a study. 20,21 Instead of creating a new model for every scan, a computer can use statistical rules such as adaptive statistical iterative reconstruction (ASIR) by GE Healthcare.…”

Section: Introductionmentioning

confidence: 99%

Impact of Low-Dose Computed Tomography on Computed Tomography Orders and Scan Length

Simmons

Milburn

2019

TOJ

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Background: New techniques have reduced the radiation dose delivered from a computed tomography (CT) examination. These techniques do not affect the number of scans ordered, the number of phases in each examination, or the scan length, as these parameters are controlled by ordering providers and CT technologists. The purpose of this study was to determine if deploying low-dose CT resulted in an increase in radiation exposure because of more liberal ordering habits or more liberal scanning ranges.Methods: We identified the most frequent CT examination types through a retrospective study of billing data from 2013. A campaign for low-dose CT scans was implemented, and data from 2 months prior and 2 months after were collected (n=797; average age=51.0 years ± 20.5; range, 4 to 97 years) and analyzed for differences in radiation dose, overall area scanned, and number of phases requested using unpaired t tests.Results: According to the billing data, the largest category of CT scans was the abdominal CT (31% of all CT examinations). After the low-dose campaign was implemented, we observed no difference in the number of examination phases ordered (1.2 ± 0.5 vs 1.3 ± 0.6, P=0.15), no increase in length of the scan (45.1 ± 7.5 cm vs 43.7 ± 10. 4 cm, P=0.08), and an overall decrease in dose (1,069 ± 634 mGy*cm vs 676 ± 480 mGy*cm, P<0.001).Conclusion: A campaign alerting staff to the availability of low-dose CT did not cause an increase in CT examination ordering and did not impact the area scanned by technologists.

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The use of model-based iterative reconstruction to decrease ED radiation exposure

Cited by 6 publications

References 23 publications

Two-dimensional and three-dimensional imaging of uterus and fallopian tubes in female infertility

Two-dimensional and three-dimensional imaging of uterus and fallopian tubes in female infertility

Iterative Model Reconstruction in Lumbar Spine Image Retrieval from Computed Tomography of the Abdomen and Pelvis

Impact of Low-Dose Computed Tomography on Computed Tomography Orders and Scan Length

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