Investigation of Patient Exposure Doses in Diagnostic Radiography in 2011 Questionnaire

Asada, Yasuki; Suzuki, Syoichi; Kobayashi, Kenichi; Kato, Harumi; Igarashi, Takayuki; Tsukamoto, Atsuko; Sakamoto, Hajime

doi:10.6009/jjrt.2013_jsrt_69.4.371

Cited by 12 publications

(9 citation statements)

References 3 publications

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“…The CTDI vol values for each anatomical region in this study were mostly very similar to those of the other countries, although the 75th percentile of the CTDI vol for the head and abdomen in adults was noticeably higher in Japan than in other countries. These CTDI vol values have not changed since the 2011 survey 15 ( Figure 3). This would ideally prompt an earnest attempt to reduce the diagnostic radiation dose of the adult head and abdomen.…”

Section: Full Paper: Survey Of Volume Ct Dose Index In Japan In 2014 Bjrmentioning

confidence: 99%

“…Therefore, a new set of Japanese DRLs has become an urgent necessity. In 2011, Asada et al 15 reported mean CTDI vol values for the head (non-helical and helical), chest and upper abdomen of both adults and children, which were obtained using a nationally distributed questionnaire. The aims of this study are to propose a new set of Japanese DRLs for 2014 and to study the impact of tube voltage and the type of reconstruction algorithm on patient doses.…”

Section: Discussionmentioning

confidence: 99%

“…The national DRLs presented in this survey were determined using the 75th percentile of the CTDI vol , in accordance with the fact that the DRLs reported in other countries are usually based on the 75th percentile of the CTDI vol . 8,9,[16][17][18] The method of surveying CTDI vol values in Japan was the same as that used in the study by Asada et al 15 in 2011, which serves as a basis for comparison with the present work.…”

Section: Analysis Of Collected Datamentioning

confidence: 99%

“…10 reported that the utilization rates of MDCT with 16 and 64 channels were 38.3% and 25.5%, respectively, in the Gunma prefecture of Japan in 2010. Asada et al 15 reported that the use of MDCT with 64 channels (35.9%) was slightly more frequent than the use of MDCT with 16 channels (32.5%) in Japan in 2011. MDCT with 64 channels was used in half of the CT scanners included in the 2014 survey, implying that there is a general trend in Japan towards adopting MDCT with 64 channels.…”

Section: Analysis Of Collected Datamentioning

confidence: 99%

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Survey of volume CT dose index in Japan in 2014

Matsunaga

Kawaguchi

Kobayashi

et al. 2015

BJR

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Objective: The aims of this study are to propose a new set of Japanese diagnostic reference levels (DRLs) for 2014 and to study the impact of tube voltage and the type of reconstruction algorithm on patient doses. The volume CT dose index (CTDI vol ) for adult and paediatric patients is assessed and compared with the results of a 2011 national survey and data from other countries. Methods: Scanning procedures for the head (non-helical and helical), chest and upper abdomen were examined for adults and 5-year-old children. A questionnaire concerning the following items was sent to 3000 facilities: tube voltage, use of reconstruction algorithms and displayed CTDI vol . Results: The mean CTDI vol values for paediatric examinations using voltages ranging from 80 to 100 kV were significantly lower than those for paediatric examinations using 120 kV. For adult examinations, the use of iterative reconstruction algorithms significantly reduced the mean CTDI vol values compared with the use of filtered back projection. Paediatric chest and abdominal scans showed slightly higher mean CTDI vol values in 2014 than in 2011. The proposed DRLs for adult head and abdominal scans were higher than those reported in other countries. Conclusion:The results imply that further optimization of CT examination protocols is required for adult head and abdominal scans as well as paediatric chest and abdominal scans. Advances in knowledge: Low-tube-voltage CT may be useful for reducing radiation doses in paediatric patients. The mean CTDI vol values for paediatric scans showed little difference that could be attributed to the choice of reconstruction algorithm.

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Section: Full Paper: Survey Of Volume Ct Dose Index In Japan In 2014 Bjrmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Analysis Of Collected Datamentioning

confidence: 99%

Section: Analysis Of Collected Datamentioning

confidence: 99%

See 2 more Smart Citations

Survey of volume CT dose index in Japan in 2014

Matsunaga

Kawaguchi

Kobayashi

et al. 2015

BJR

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“…examinations at levels that have been found to be safe (Asada et al, 2013). Every aspect of radiology has been enhanced by DL and ML.…”

Section: Radiologymentioning

confidence: 99%

Advancements in medical diagnosis and treatment through machine learning: A review

Ahsan,

Khan,

Khan

et al. 2023

Expert Systems

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The aptness of machine learning (ML) to learn from large datasets, discover trends, and make predictions has demonstrated its potential to metamorphose the medical field. Medical data analysis with ML algorithms can improve patient outcomes in terms of both treatment and diagnosis. This paper investigates the numerous possibilities of ML in the medical industries, including radiology, pathology, genomics, and clinical decision‐making. It also goes over the benefits and drawbacks of ML in various sectors as well as the limitations that come with its application. It illustrates the potential advantages of ML, such as better accuracy and efficiency in diagnosis and individualized treatment programs, through a review of previous studies. Lastly, it provides perspectives on prospective advancements and prospects for the discipline. This study also intends to investigate the applications of deep learning (DL) in the medical field. DL algorithms have performed exceptionally satisfactorily in several healthcare‐related fields. The main conclusions of the study are summarized, and their ramifications for the healthcare sector are discussed in this paper's conclusion. This paper intends to contribute to a greater understanding of the prevailing state of the discipline and the possibility for future developments by emphasizing the prospects of these methodologies to alter medical study and clinical practice.

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Dose reduction technique in diagnostic X-ray computed tomography by use of 6-channel multileaf collimators

Hashimoto

Teramoto

Asada

et al. 2016

Radiol Phys Technol

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Recently, region-setting computed tomography (CT) has been studied as a region of interest imaging method. This technique can strongly reduce the radiation dose by limiting the irradiation field. Although mathematical studies have been performed for reduction of the truncation artifact, no experimental studies have been performed so far. In this study, we developed a three-dimensional region-setting CT system and evaluated its imaging properties. As an experimental system, we developed an X-ray CT system with multileaf collimators. In this system, truncated projection data can be captured by limiting of the radiation field. In addition, a truncated projection data correction was performed. Finally, image reconstruction was performed by use of the Feldkamp-Davis-Kress algorithm. In the experiments, the line profiles and the image quality of the reconstructed images were evaluated. The results suggested that the image quality of the proposed method is comparable to that of the original method. Furthermore, we confirmed that the radiation dose was reduced when this system was used. These results indicate that a 3D region-setting CT system using 6-channel multileaf collimators can reduce the radiation dose without in causing a degradation of image quality.

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Investigation of Patient Exposure Doses in Diagnostic Radiography in 2011 Questionnaire

Cited by 12 publications

References 3 publications

Survey of volume CT dose index in Japan in 2014

Survey of volume CT dose index in Japan in 2014

Advancements in medical diagnosis and treatment through machine learning: A review

Dose reduction technique in diagnostic X-ray computed tomography by use of 6-channel multileaf collimators

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