Radiation dose of digital tomosynthesis for sinonasal examination: Comparison with multi-detector CT

Machida, Haruhiko; Yuhara, Toshiyuki; Tamura, Mieko; Numano, Tomokazu; Abe, Shinji; Sabol, John M.; Suzuki, Shigeru; Ueno, Eiko

doi:10.1016/j.ejrad.2011.03.064

Cited by 12 publications

(9 citation statements)

References 15 publications

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“…DT sinus radiography is routinely performed using posteroanterior projections with a limited sweep angle (eg, 40°; number of projections, 60) and thus exposes the eye lens to little direct radiation; instead, the majority of the incident xray fluence is attenuated by the overlying tissues, mainly the skull, before exposure to the eye lens (41). According to a phantom study, radiation exposure to the eye lens, one of the most radiosensitive organs, with DT sinus radiography was 0.1 mGy (41), lower than the reported dose of 0.5 mGy for conventional sinus radiography, con-sisting of Waters, Caldwell, and lateral projections (42), and markedly lower than that of 10.6-32.0 mGy for routine sinus multidetector CT (43).…”

Section: Head and Neck Imagingmentioning

confidence: 99%

Whole-Body Clinical Applications of Digital Tomosynthesis

Machida

Yuhara²,

Tamura³

et al. 2016

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With flat-panel detector mammography, radiography, and fluoroscopy systems, digital tomosynthesis (DT) has been recently introduced as an advanced clinical application that removes overlying structures, enhances local tissue separation, and provides depth information about structures of interest by providing high-quality tomographic images. DT images are generated from projection image data, typically using filtered back-projection or iterative reconstruction. These low-dose x-ray projection images are easily and swiftly acquired over a range of angles during a single linear or arc sweep of the x-ray tube assembly. DT is advantageous in a variety of clinical contexts, including breast, chest, head and neck, orthopedic, emergency, and abdominal imaging. Specifically, compared with conventional mammography, radiography, and fluoroscopy, as a result of reduced tissue overlap DT can improve detection of breast cancer, pulmonary nodules, sinonasal mucosal thickening, and bone fractures and delineation of complex anatomic structures such as the ostiomeatal unit, atlantoaxial joint, carpal and tarsal bones, and pancreatobiliary and gastrointestinal tracts. Compared with computed tomography, DT offers reduced radiation exposure, better in-plane resolution to improve assessment of fine bony changes, and less metallic artifact, improving postoperative evaluation of patients with metallic prostheses and osteosynthesis materials. With more flexible patient positioning, DT is also useful for functional, weight-bearing, and stress tests. To optimize patient management, a comprehensive understanding of the clinical applications and limitations of whole-body DT applications is important for improvement of diagnostic quality, workflow, and cost-effectiveness. Online supplemental material is available for this article. (©)RSNA, 2016.

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Section: Head and Neck Imagingmentioning

confidence: 99%

Whole-Body Clinical Applications of Digital Tomosynthesis

Machida

Yuhara²,

Tamura³

et al. 2016

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“…In addition, the radiation dose remained substantially lower than the dose used in low-dose MDCT protocols. According to a phantom study, eye lens dose of 0.1 mGy for DT sinus radiography was lower than the previously reported dose of 0.5 mGy for conventional radiography, consisting of Waters, Caldwell, and lateral projections (13,18). The threshold for pathological radiographic mucosal thickening varies within the literature.…”

Section: Discussionmentioning

confidence: 60%

“…In a field of PNS sections, DT can easily and promptly provide sinus coronal tomographic images with high in-plane spatial resolution and is able to remove overlying structures, enhance local tissue separation, and provide depth information. According to a phantom study by Machida et al (13), the DT doses for the thyroid gland, brain, submandibular gland, skin, and eyes were lower than the doses of MDCT with values of 230 ± 90, 1770 ± 560, 1400 ± 80, 1160 ± 2100, and 112 ± 6 μGy, respectively.…”

Section: Introductionmentioning

confidence: 99%

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Assessment of Maxillary Sinus Wall Thickness with Paranasal Sinus Digital Tomosynthesis and CT

Byun

Shim

Kim

et al. 2017

J Korean Soc Radiol

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Purpose:This study was performed to compare paranasal sinus tomosynthesis with computed tomography (CT) imaging as a radiologic tool to evaluate the paranasal sinuses, using measurement of the soft tissue thickness of the maxillary sinus. Materials and Methods: A total of 114 patients with sinusitis who underwent both paranasal sinus digital tomosynthesis (DT) and CT were enrolled in this retrospective study. Two observers independently assessed soft tissue thickness in both maxillary sinus chambers using both DT and CT images. Results: The mean difference in soft tissue thickness measured by each observer was -0.31 mm on CT and 0.15 mm on DT. The mean differences in soft tissue thickness measured with DT and CT were -0.15 by observer 1 and -0.31 by observer 2. Evaluation of the agreement in measurement of soft tissue thickness in the maxillary sinus using DT and CT showed a high intraclass correlation, with the 95% limit of agreement ranging from -3.36 mm to 3.06 mm [intraclass correlation coefficient (ICC), 0.994: p < 0.01] for observer 1 and from -5.56 mm to 4.95 mm (ICC, 0.984: p < 0.01) for observer 2. Conclusion: As an imaging tool, DT is comparable to CT for assessing the soft tissue thickness of maxillary sinuses in patients with sinusitis. Index terms

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“…It is called limited-angle computed tomography (CT) as it yields a clear tomographic image. Tomosynthesis has already been used for mammography or for images of the head and neck region, and the effectiveness in the orthopedic field has been widely recognized in recent years because tomographic images can be taken under mechanical stress, including the standing position ( 6 – 10 ).…”

Section: Introductionmentioning

confidence: 99%

Assessment of lateral hindfoot impingement with weightbearing multiplanar imaging in a flatfoot

Yoshida

Matsubara

Kawashima

et al. 2020

Acta Radiologica Open

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Background Estimation of the lateral hindfoot impingement in the standing position in conventional radiography can be difficult due to superimposition of different bones. Patients with flat feet frequently suffer from pain around the lateral malleolus and sinus tarsi caused by osseous impingement in the lateral hindfoot. Weightbearing multiplanar images (tomosynthesis) yield tomographic images and can be taken while full weightbearing. Purpose To assess the availability of tomosynthesis to determine hindfoot lateral impingement. Material and Methods A total of 14 feet (in 13 patients) with acquired flatfoot deformity and lateral hindfoot pain were included (mean age 64 years; age range 55–80 years). All patients underwent tomosynthesis, radiography, and computed tomography (CT) (non-weightbearing). Talofibular, calcaneofibular, and talocalcaneal impingement were determined. To compare the number of impingements or to determine the area between each image, statistical evaluations were analyzed using the Mann–Whitney U-test ( P < 0.05). Results On tomosynthesis, we clearly found talofibular impingement in three feet, calcaneofibular impingement in seven feet, and talocalcaneal impingement in 11 feet. Therefore, we could identify most impingements as “positive” compared to those on normal radiographs and CT images. The number of impingements in the calcaneofibular and talocalcaneal regions was significantly higher using tomosynthesis than when using CT ( P < 0.05). Conclusion Tomosynthesis imaging makes it easier to obtain CT-like images in a short period of time, in a free position, including while standing, and provides useful information to assess lateral pain in patients with flatfoot deformity.

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Radiation dose of digital tomosynthesis for sinonasal examination: Comparison with multi-detector CT

Cited by 12 publications

References 15 publications

Whole-Body Clinical Applications of Digital Tomosynthesis

Whole-Body Clinical Applications of Digital Tomosynthesis

Assessment of Maxillary Sinus Wall Thickness with Paranasal Sinus Digital Tomosynthesis and CT

Assessment of lateral hindfoot impingement with weightbearing multiplanar imaging in a flatfoot

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