Evaluation of Ultra-Low Dose CT in the Diagnosis of Pediatric-Like Fractures Using an Experimental Animal Study

Moritz, J.; Hoffmann, B.; Sehr, D; Keil, K.; Eggerking, J; Groth, Godo; Caliebe, Amke; Dischinger, J.; Heller, Martin; Bolte, Hendrik

doi:10.3348/kjr.2012.13.2.165

Cited by 14 publications

(12 citation statements)

References 23 publications

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“…Therefore, it is reasonable to assume that radiation dose reduction during CT examination is one of the most effective ways to reduce the total amount of radiation that a patient is exposed to. To compensate for the rapid increase in medical radiation exposure by CT, continued efforts have been made to reduce radiation dose and to develop radiation reduction techniques ( 3 , 6 - 10 ). Recently, two new radiation reduction techniques have been introduced.…”

Section: Introductionmentioning

confidence: 99%

Radiation Dose Reduction via Sinogram Affirmed Iterative Reconstruction and Automatic Tube Voltage Modulation (CARE kV) in Abdominal CT

et al. 2013

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ObjectiveTo evaluate the feasibility of sinogram-affirmed iterative reconstruction (SAFIRE) and automated kV modulation (CARE kV) in reducing radiation dose without increasing image noise for abdominal CT examination.Materials and MethodsThis retrospective study included 77 patients who received CT imaging with an application of CARE kV with or without SAFIRE and who had comparable previous CT images obtained without CARE kV or SAFIRE, using the standard dose (i.e., reference mAs of 240) on an identical CT scanner and reconstructed with filtered back projection (FBP) within 1 year. Patients were divided into two groups: group A (33 patients, CT scanned with CARE kV); and group B (44 patients, scanned after reducing the reference mAs from 240 to 170 and applying both CARE kV and SAFIRE). CT number, image noise for four organs and radiation dose were compared among the two groups.ResultsImage noise increased after CARE kV application (p < 0.001) and significantly decreased as SAFIRE strength increased (p < 0.001). Image noise with reduced-mAs scan (170 mAs) in group B became similar to that of standard-dose FBP images after applying CARE kV and SAFIRE strengths of 3 or 4 when measured in the aorta, liver or muscle (p ≥ 0.108). Effective doses decreased by 19.4% and 41.3% for groups A and B, respectively (all, p < 0.001) after application of CARE kV with or without SAFIRE.ConclusionCombining CARE kV, reduction of mAs from 240 to 170 mAs and noise reduction by applying SAFIRE strength 3 or 4 reduced the radiation dose by 41.3% without increasing image noise compared with the standard-dose FBP images.

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Section: Introductionmentioning

confidence: 99%

Radiation Dose Reduction via Sinogram Affirmed Iterative Reconstruction and Automatic Tube Voltage Modulation (CARE kV) in Abdominal CT

et al. 2013

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“…This result is consistent with previous reports that dose-reduced CT was sufficient for diagnosis of fracture in cervical spine trauma [27] and in the experimental animal model. [28] However, subtle rib contour abnormality (buckle fracture) could not be easily detected using low-dose CT. Thus, additional coronal and sagittal reformatted images can be helpful for detection of fractures that are missed on axial images.…”

Section: Discussionmentioning

confidence: 99%

Usefulness of low dose chest CT for initial evaluation of blunt chest trauma

et al. 2017

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We aimed to compare the diagnostic performance and inter-observer consistency between low dose chest CT (LDCT) and standard dose chest CT (SDCT) in the patients with blunt chest trauma.A total of 69 patients who met criteria indicative of blunt chest trauma (77% of male; age range, 16–85) were enrolled. All patients underwent LDCT without intravenous (IV) contrast and SDCT with IV contrast using parameters as following: LDCT, 40 mAs with automatic tube current modulation (ATCM) and 100 kVp (BMI <25, n = 51) or 120 kVp (BMI>25, n = 18); SDCT, 180 mAs with ATCM and 120 kVp. Transverse, coronal, sagittal images were reconstructed with 3-mm slice thickness without gap and provided for evaluation of 3 observers. Reference standard images (transverse, coronal, sagittal) were reconstructed using SDCT data with 1-mm slice thickness without gap. Reference standard was established by 2 experienced thoracic radiologists by consensus. Three observers independently evaluated each data set of LDCT and SDCT.Multiple-reader receiver operating characteristic analysis for comparing areas under the ROC curves demonstrated that there was no significant difference of diagnostic performance between LDCT and SDCT for the diagnosis of pulmonary injury, skeletal trauma, mediastinal injury, and chest wall injury (P > 0.05). The intraclass correlation coefficient was measured for inter-observer consistency and revealed that there was good inter-observer consistency in each examination of LDCT and SDCT for evaluation of blunt chest injury (0.8601–1.000). Aortic and upper abdominal injury could not be appropriately compared as LDCT was performed without using contrast materials and this was limitation of this study.The effective radiation dose of LDCT (average DLP = 1.52 mSv⋅mGy−1 cm−1) was significantly lower than those of SDCT (7.21 mSv mGy−1 cm−1).There is a great potential benefit to use of LDCT for initial evaluation of blunt chest trauma because LDCT could maintain diagnostic image quality as SDCT and provide significant radiation dose reduction. A further study of LDCT with IV contrast for evaluation of aortic and upper abdominal injury is needed.

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“…14 Wang et al 12 reported that when conducting an MDCT scan for orbital trauma, images acquired using 100 mA tube current (the conventional dose is 300 mA) met the clinical diagnostic requirements, resulting in decreased patient radiation exposure. With regard to extremity imaging, Moritz et al 15 demonstrated that ultra-low-dose CT (up to 11 mA) showed sufficient diagnostic performance for fractures, despite the significant radiation reduction. In this study, we used tube current half of standard dose CT and compared scan image quality and diagnostic performance between standard-dose and low-dose CT.…”

Section: Discussionmentioning

confidence: 99%

Radiation dose reduction in multidetector CT in fracture evaluation

Park

Lee

et al. 2017

The British Journal of Radiology

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The evaluation of extremities for fractures using low-dose CT can reduce radiation exposure by about 50% compared with standard-dose CT without affecting image quality or diagnostic performance. Advances in knowledge: Low-dose CT of the extremities (shoulder, pelvis, ankle and wrist) can reduce radiation dose by about 50% compared with standard-dose CT and does not significantly affect image quality or diagnostic performance in fracture detection.

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Evaluation of Ultra-Low Dose CT in the Diagnosis of Pediatric-Like Fractures Using an Experimental Animal Study

Cited by 14 publications

References 23 publications

Radiation Dose Reduction via Sinogram Affirmed Iterative Reconstruction and Automatic Tube Voltage Modulation (CARE kV) in Abdominal CT

Radiation Dose Reduction via Sinogram Affirmed Iterative Reconstruction and Automatic Tube Voltage Modulation (CARE kV) in Abdominal CT

Usefulness of low dose chest CT for initial evaluation of blunt chest trauma

Radiation dose reduction in multidetector CT in fracture evaluation

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