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57 results on '"Koyama, Shuji"'

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1. Estimating organ dose with optimized peak dose index in cone-beam CT scans.

2. A Comparison and Evaluation of Two Commercially Available Metal Artifact Reduction Applications.

4. EXAMINATION OF LENS EXPOSURE DOSES OF CARDIOLOGISTS, NEUROSURGEONS AND RADIOLOGISTS IN INTERVENTIONAL RADIOLOGY.

5. Reproducibility of functional connectivity metrics estimated from resting-state functional MRI with differences in days, coils, and global signal regression.

6. Functional connector hubs in the cerebellum.

7. Reserve and Maintenance in the Aging Brain: A Longitudinal Study of Healthy Older Adults.

8. Effects of Head Motion on the Evaluation of Age-related Brain Network Changes Using Resting State Functional MRI.

9. Bridging large-scale cortical networks: Integrative and function-specific hubs in the thalamus.

10. Automatic measurement of mandibular cortical bone width on cone-beam computed tomography images.

11. Distribution of scatter radiation by C-arm cone-beam computed tomography in angiographic suite: measurement of doses and effectiveness of protection devices.

12. A new cone-beam computed tomography dosimetry method providing optimal measurement positions: A Monte Carlo study.

13. Identifying the brain's connector hubs at the voxel level using functional connectivity overlap ratio.

14. Aging Impacts the Overall Connectivity Strength of Regions Critical for Information Transfer Among Brain Networks.

15. Changes in white matter fiber density and morphology across the adult lifespan: A cross-sectional fixel-based analysis.

16. ORGAN ABSORBED DOSE ESTIMATION REFLECTING SPECIFIC ORGAN MASSES WITH SIMPLE SCALING OF REFERENCE DOSES USING THE ORGAN MASSES.

17. Automatic Remasking of Digital Subtraction Angiography Images in Pulmonary Angiography.

18. Size-specific dose estimates for various weighting factors of CTDI equation.

19. Reorganization of brain networks and its association with general cognitive performance over the adult lifespan.

20. Accuracy validation of incident photon fluence on detective quantum efficiency in mammography.

21. Effects of Gradient Coil Noise and Gradient Coil Replacement on the Reproducibility of Resting State Networks.

22. New weighting factor of weighted CTDI equation for PMMA phantom diameter from 8 to 40 cm: A Monte Carlo study.

24. Influence of 320-detector-row volume scanning and AAPM report 111 CT dosimetry metrics on size-specific dose estimate: a Monte Carlo study.

25. Evaluation of radiation exposure dose at double-balloon endoscopy for the patients with small bowel disease.

26. Pin-photodiode array for the measurement of fan-beam energy and air kerma distributions of X-ray CT scanners.

27. Regional brain activity during jaw clenching with natural teeth and with occlusal splints: a preliminary functional MRI study.

28. Luminescence imaging of water during carbon-ion irradiation for range estimation.

29. [Radiation Dose to Patients Undergoing X-ray Diagnosis, Treatment and Follow-up for Cerebral Aneurysms].

31. Radiation dose evaluation in 3D rotation angiography and cone-beam computed tomography with a flat panel detector.

32. Investigation of measurement accuracy of factors used for detective quantum efficiency measurement in digital radiography.

33. Influence of difference in cross-sectional dose profile in a CTDI phantom on X-ray CT dose estimation: a Monte Carlo study.

34. Accuracy validation of incident photon fluence on DQE for various measurement conditions and X-ray units.

35. Organ dose and effective dose estimation in paediatric chest radiographic examinations by using pin silicon photodiode dosemeters.

36. Comparison of radiation doses between newborns and 6-y-old children undergoing head, chest and abdominal CT examinations: a phantom study.

37. [Comparison of absorbed and effective dose from two dental cone beam computed tomography scanners].

39. Patient radiation dose in prospectively gated axial CT coronary angiography and retrospectively gated helical technique with a 320-detector row CT scanner.

40. Radiation dose evaluation in tomosynthesis and C-arm cone-beam CT examinations with an anthropomorphic phantom.

41. Radiation dose evaluation in head and neck MDCT examinations with a 6-year-old child anthropomorphic phantom.

42. Evaluation of radiation doses from MDCT-imaging in otolaryngology.

43. [Estimation of effective dose to salivary glands at examination of the oral and maxillofacial region].

44. [Method of segmenting inferior horns of lateral ventricles using active contour models].

45. Organ and effective dose evaluation in diagnostic radiology based on in-phantom dose measurements with novel photodiode-dosemeters.

46. [Development of automated measurement method for medial temporal lobe on CT images].

47. [Evaluation of the effectiveness of gonad protection in diagnostic radiology].

48. Usefulness of a method for changing tube current during helical scanning in multislice CT.

49. [Image quality and radiation exposure in mass mammography examinations: a report from the Survey Group for Institutional Evaluation].

50. Influence of monitor luminance change on observer performance for detection of abnormalities depicted on chest radiographs.

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