Japanese Journal of Radiological Technology

Online ISSN : 1881-4883
Print ISSN : 0369-4305
ISSN-L : 0369-4305

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Volume 60, Issue 5

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[title in Japanese]

Article type: Cover
2004 Volume 60 Issue 5 Pages Cover18-
Published: May 20, 2004
Released on J-STAGE: June 30, 2017

DOIhttps://doi.org/10.6009/jjrt.KJ00000922411

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[title in Japanese]

Article type: Cover
2004 Volume 60 Issue 5 Pages Cover19-
Published: May 20, 2004
Released on J-STAGE: June 30, 2017

DOIhttps://doi.org/10.6009/jjrt.KJ00000922412

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[title in Japanese]

Article type: Index
2004 Volume 60 Issue 5 Pages Toc15-
Published: May 20, 2004
Released on J-STAGE: June 30, 2017

DOIhttps://doi.org/10.6009/jjrt.KJ00000922413

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[title in Japanese]

Article type: Index
2004 Volume 60 Issue 5 Pages Toc16-
Published: May 20, 2004
Released on J-STAGE: June 30, 2017

DOIhttps://doi.org/10.6009/jjrt.KJ00000922414

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[title in Japanese]

[in Japanese]

Article type: Article
2004 Volume 60 Issue 5 Pages I-
Published: May 20, 2004
Released on J-STAGE: June 30, 2017

DOIhttps://doi.org/10.6009/jjrt.KJ00000922415

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[title in Japanese]

Article type: Appendix
2004 Volume 60 Issue 5 Pages II-
Published: May 20, 2004
Released on J-STAGE: June 30, 2017

DOIhttps://doi.org/10.6009/jjrt.KJ00000922416

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[title in Japanese]

Article type: Appendix
2004 Volume 60 Issue 5 Pages III-
Published: May 20, 2004
Released on J-STAGE: June 30, 2017

DOIhttps://doi.org/10.6009/jjrt.KJ00000922417

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[title in Japanese]

Article type: Appendix
2004 Volume 60 Issue 5 Pages III-
Published: May 20, 2004
Released on J-STAGE: June 30, 2017

DOIhttps://doi.org/10.6009/jjrt.KJ00000922418

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[title in Japanese]

Article type: Appendix
2004 Volume 60 Issue 5 Pages IV-
Published: May 20, 2004
Released on J-STAGE: June 30, 2017

DOIhttps://doi.org/10.6009/jjrt.KJ00000922419

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[title in Japanese]

Article type: Appendix
2004 Volume 60 Issue 5 Pages V-
Published: May 20, 2004
Released on J-STAGE: June 30, 2017

DOIhttps://doi.org/10.6009/jjrt.KJ00000922420

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[title in Japanese]

Article type: Appendix
2004 Volume 60 Issue 5 Pages V-
Published: May 20, 2004
Released on J-STAGE: June 30, 2017

DOIhttps://doi.org/10.6009/jjrt.KJ00000922421

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[title in Japanese]

Article type: Appendix
2004 Volume 60 Issue 5 Pages VI-
Published: May 20, 2004
Released on J-STAGE: June 30, 2017

DOIhttps://doi.org/10.6009/jjrt.KJ00000922422

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[title in Japanese]

Article type: Appendix
2004 Volume 60 Issue 5 Pages VI-
Published: May 20, 2004
Released on J-STAGE: June 30, 2017

DOIhttps://doi.org/10.6009/jjrt.KJ00000922423

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Introduction(Beam Radiotherapy : Present Status and Future)(Establishment of QC and QA of the External Beam Radiotherapy: Present Status and Future)(The 59th Annual Scientific Congress Symposium II)

YASUMITSU KAWAGOE

Article type: Article
2004 Volume 60 Issue 5 Pages 595-596
Published: May 20, 2004
Released on J-STAGE: June 30, 2017

DOIhttps://doi.org/10.6009/jjrt.KJ00000922424

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1.About the Present Condition of the Quality Assurance and the Quality Control in External Radiotherapy(Beam Radiotherapy : Present Status and Future)(Establishment of QC and QA of the External Beam Radiotherapy: Present Status and Future)(The 59th Annual Scientific Congress Symposium II)

YOSHIHIRO ENOKIDO

Article type: Article
2004 Volume 60 Issue 5 Pages 596-601
Published: May 20, 2004
Released on J-STAGE: June 30, 2017

DOIhttps://doi.org/10.6009/jjrt.KJ00000922425

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2.Quality Assurance of External Beam Radiation Therapy Equipment(Beam Radiotherapy : Present Status and Future)(Establishment of QC and QA of the External Beam Radiotherapy: Present Status and Future)(The 59th Annual Scientific Congress Symposium II)

HIROSHI OGUCHI

Article type: Article
2004 Volume 60 Issue 5 Pages 601-606
Published: May 20, 2004
Released on J-STAGE: June 30, 2017

DOIhttps://doi.org/10.6009/jjrt.KJ00000922426

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3.Quality Assurance and Quality Control for Radiation Treatment Planning Systems(Beam Radiotherapy : Present Status and Future)(Establishment of QC and QA of the External Beam Radiotherapy: Present Status and Future)(The 59th Annual Scientific Congress Symposium II)

KUNIHIKO TATEOKA

Article type: Article
2004 Volume 60 Issue 5 Pages 607-616
Published: May 20, 2004
Released on J-STAGE: June 30, 2017

DOIhttps://doi.org/10.6009/jjrt.KJ00000922427

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4.Quality Control for Clinical Reference Dosimetry of External Beam Radiation Therapy(Beam Radiotherapy : Present Status and Future)(Establishment of QC and QA of the External Beam Radiotherapy: Present Status and Future)(The 59th Annual Scientific Congress Symposium II)

FUJIO ARAKI

Article type: Article
2004 Volume 60 Issue 5 Pages 616-625
Published: May 20, 2004
Released on J-STAGE: June 30, 2017

DOIhttps://doi.org/10.6009/jjrt.KJ00000922428

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Status of Medical Imaging for Regenerative and Genomics Medicine(The 59th Annual Scientific Congress)

MAKOTO KIKUCHI

Article type: Article
2004 Volume 60 Issue 5 Pages 626-634
Published: May 20, 2004
Released on J-STAGE: June 30, 2017

DOIhttps://doi.org/10.6009/jjrt.KJ00000922429

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Implications of Health Risk of Radiation Exposures Less Than 100mGy : Focused on the Linear Non-threshold Hypothesis(The 59th Annual Scientific Congress)

MASAHIRO DOI

Article type: Article
2004 Volume 60 Issue 5 Pages 635-645
Published: May 20, 2004
Released on J-STAGE: June 30, 2017

DOIhttps://doi.org/10.6009/jjrt.KJ00000922430

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Radiological Technology Practice and Medical Ethics( Educational Lecture : Radiological Technology Practice and Medical Ethics)

TADASHI SUNAYASHIKI

Article type: Article
2004 Volume 60 Issue 5 Pages 646-653
Published: May 20, 2004
Released on J-STAGE: June 30, 2017

DOIhttps://doi.org/10.6009/jjrt.KJ00000922431

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Three Dimensional Ultrasound & Compound Method(Basic Lectures : Ultrasound)

TOSHIKAZU AKIYAMA, [in Japanese], [in Japanese]

Article type: Article
2004 Volume 60 Issue 5 Pages 654-660
Published: May 20, 2004
Released on J-STAGE: June 30, 2017

DOIhttps://doi.org/10.6009/jjrt.KJ00000922432

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Challenge to International Meetings(Scientific Lecture Series)

FUJIO ARAKI

Article type: Article
2004 Volume 60 Issue 5 Pages 661-665
Published: May 20, 2004
Released on J-STAGE: June 30, 2017

DOIhttps://doi.org/10.6009/jjrt.KJ00000922433

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Quantification and Standardization in Myocardial SPECT(Clinical Technology Course)

MASAMICHI YANAGISAWA

Article type: Article
2004 Volume 60 Issue 5 Pages 666-675
Published: May 20, 2004
Released on J-STAGE: June 30, 2017

DOIhttps://doi.org/10.6009/jjrt.KJ00000922434

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A Study for the Prevention of Medical Accidents for Clinical Examination in a Department of Radiology : Part 1. Questionnaire Investigation and Analysis of Risk Cases(Report from the Scientific Research Group)

KOZO KUMAGAI, [in Japanese], [in Japanese], [in Japanese], [in Japanes ...

Article type: Article
2004 Volume 60 Issue 5 Pages 676-685
Published: May 20, 2004
Released on J-STAGE: June 30, 2017

DOIhttps://doi.org/10.6009/jjrt.KJ00000922435

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The Report from the Study Group of the Quality Control Manual of Thoracic CT Screening(Report from the Scientific Research Group)

YOSHIMASA NAKAMURA, [in Japanese], [in Japanese], [in Japanese], [in J ...

Article type: Article
2004 Volume 60 Issue 5 Pages 686-688
Published: May 20, 2004
Released on J-STAGE: June 30, 2017

DOIhttps://doi.org/10.6009/jjrt.KJ00000922436

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Explanation of the Draft "Release of Patients after Therapy with Unsealed Radionuclides" of the International Commission on Radiological Protection : The 2nd Report( Science Exchanges Committee Report)

HIROSHI WATANABE, [in Japanese], [in Japanese], [in Japanese], [in Jap ...

Article type: Article
2004 Volume 60 Issue 5 Pages 689-697
Published: May 20, 2004
Released on J-STAGE: June 30, 2017

DOIhttps://doi.org/10.6009/jjrt.KJ00000922437

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Remote Security Guide(JIRA Topics)

SHINICHIRO NISHIDA

Article type: Article
2004 Volume 60 Issue 5 Pages 698-699
Published: May 20, 2004
Released on J-STAGE: June 30, 2017

DOIhttps://doi.org/10.6009/jjrt.KJ00000922438

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Examination of Susceptibility Artifact in Three-dimensional Gadolinium-enhanced Chest MR Angiography

TAKESHI MATSUMOTO, TOSHIO TSUCHIHASHI, TOSHIO MAKI, ATSUSHI IWASAKI, K ...

Article type: Article
2004 Volume 60 Issue 5 Pages 701-707
Published: May 20, 2004
Released on J-STAGE: June 30, 2017

DOIhttps://doi.org/10.6009/jjrt.KJ00000922439

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Signal loss that is sometimes found in the subclavian artery during chest MR angiography is thought to be caused by the susceptibility effect of highly concentrated contrast medium. In our research project, we examined the conditions under which signal loss occurs. We made vessel phantoms (artery phantom, vein phantom) that contained different concentrations of Gd-DTPA water solutions, and placed them in a 0.5 mmol/l Gd-DTPA water solution. We examined signal loss when the vein phantom was parallel to the magnetic field and when it was perpendicular to the magnetic field. We found that there was no signal loss in the artery phantom when the vein phantom was parallel to the magnetic field. In contrast, signal loss occurred in the artery phantom when the vein phantom was perpendicular to the magnetic field. The higher the concentration in the vein phantom, the closer the distance to the vessel phantom, and the longer the echo time (TE), the greater was the signal loss. Thus, the cause of signal loss in the subclavian artery was found to be the perpendicular orientation of the subclavian vein (through which the highly concentrated contrast medium flows) to the magnetic field. With the MRI devices currently in use, perpendicular orientation of the subclavian vein to the magnetic field cannot be avoided. Furthermore, the subclavian vein and subclavian artery are anatomically in close proximity to one another. These factors cause the susceptibility artifact, which is thought to result in signal loss in the subclavian artery.

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Studies of Artifacts with TFE Factor Increase in Heart Delayed Enhancement MRI Sequence IR-T1TFE

TOMOHIKO HORIE, SYU IKEDA, ISAO MURO

Article type: Article
2004 Volume 60 Issue 5 Pages 708-718
Published: May 20, 2004
Released on J-STAGE: June 30, 2017

DOIhttps://doi.org/10.6009/jjrt.KJ00000922440

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The characteristic of delayed enhancement MRI is high spatial resolution, which makes it possible to evaluate the degree of damage to the myocardium from the inner to the outer membrane of patients with ischemic heart disease. Therefore, this MRI technique is unique in its ability to detect myocardial condition and is necessary to obtain high-quality images. We experienced artifacts induced by TFE factor increase with delayed enhancement of IR-T1TFE. The purpose of this study was to determine the cause of such artifacts. IR-T1TFE changed signal intensity with phase direction as the TFE factor increased. Streak artifacts occurred because signal intensity caused changes with phase direction. Increases in TFE factor prolonged data collection time, such that marked artifacts were created because of changes in signal intensity. Ghost artifacts occurred because signal intensity changed between shots. When the TFE factor was increased, the difference in signal intensity was diminished between shots. The interval of acquired noise decreased in the raw data. Therefore, the interval of ghost artifacts became wider on images.

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Creation and Clinical Application of Real-time Dose Monitor Using Dose Area Product Meter

KOSUKE MATSUBARA, KICHIRO KOSHIDA, ATSUSHI FUKUDA, YOSHINORI UOYAMA, H ...

Article type: Article
2004 Volume 60 Issue 5 Pages 719-724
Published: May 20, 2004
Released on J-STAGE: June 30, 2017

DOIhttps://doi.org/10.6009/jjrt.KJ00000922441

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The management of patient dose has become more of an issue in recent years. Dose can be determined non-invasively and in real time through the use of a dose area product meter, but it is the area dose value that is obtained. Therefore, we created a program that estimates entrance skin dose (ESD) in real time from area dose values obtained during procedures. We used Microsoft Visual C++6.0 (Standard Edition) for the programming language and C language for the programming environment. The value was a maximum 285.4mGy at ileus tube insertion when measuring ESD for radiography of the digestive organ and non-vascular type IVR using the created program and seeking the average according to the procedures. The program that we created can be considered valid for monitoring ESD correctly and in real time.

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Method of Estimating Patient Skin Dose from Dose Displayed on Medical X-ray Equipment with Flat Panel Detector

ATSUSHI FUKUDA, KICHIRO KOSHIDA, ICHIRO YAMAGUCHI, ATSUHIKO TOGASHI, K ...

Article type: Article
2004 Volume 60 Issue 5 Pages 725-733
Published: May 20, 2004
Released on J-STAGE: June 30, 2017

DOIhttps://doi.org/10.6009/jjrt.KJ00000922442

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The International Electrotechnical Commission has stipulated that medical X-ray equipment for interventional procedures must display radiation doses such as air kerma in free air at the interventional reference point and dose area product to establish radiation safety for patients (IEC 60601-2-43). However, it is necessary to estimate entrance skin dose for the patient from air kerma for an accurate risk assessment of radiation skin injury. To estimate entrance skin dose from displayed air kerma in free air at the interventional reference point, it is necessary to consider effective energy, the ratio of the mass-energy absorption coefficient for skin and air, and the backscatter factor. In addition, since automatic exposure control is installed in medical X-ray equipment with flat panel detectors, it is necessary to know the characteristics of control to estimate exposure dose. In order to calculate entrance skin dose under various conditions, we investigated clinical parameters such as tube voltage, tube current, pulse width, additional filter, and focal spot size, as functions of patient body size. We also measured the effective energy of X-ray exposure for the patient as a function of clinical parameter settings. We found that the conversion factor from air kerma in free air to entrance skin dose is about 1.4 for protection.

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Application of the OS-EM Method to the <123>^I-IMP ARG Method : Comparison between FBP and OS-EM Methods

KAZUKO SASAKI, AYUKO SATOU, TOMOMI OOMURA, MADOKA ONO, TAKENORI HACHIY ...

Article type: Article
2004 Volume 60 Issue 5 Pages 734-739
Published: May 20, 2004
Released on J-STAGE: June 30, 2017

DOIhttps://doi.org/10.6009/jjrt.KJ00000922443

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We investigated application of the OS-EM method to the <123>^I-IMP ARG method to measure regional cerebral blood flow (rCBF). First, scan time and subsets were fixed at 20 min and 16, respectively, and the influence of iteration on the CCF and quantitative rCBF values obtained by the ARG method was investigated when the iteration number was set at 2, 4, 8, 16, 32, and 90. Next, with the number of iterations set at 4, we compared the scanning times of OS-EM and FBP. We determined that the CCF values remained at the same level irrespective of iteration number. Quantitative rCBF values had no association with iteration number, either. Using the quantitative rCBF values obtained by 20-min. scanning with FBP as a standard, the time period for collecting SPECT data was 10 min, without sacrificing image quality or quantification. Quantitative rCBF obtained by OS-EM was estimated to be higher than that by FBP.

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[title in Japanese]

Article type: Appendix
2004 Volume 60 Issue 5 Pages 740-743
Published: May 20, 2004
Released on J-STAGE: June 30, 2017

DOIhttps://doi.org/10.6009/jjrt.KJ00000922444

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[title in Japanese]

Article type: Appendix
2004 Volume 60 Issue 5 Pages 744-
Published: May 20, 2004
Released on J-STAGE: June 30, 2017

DOIhttps://doi.org/10.6009/jjrt.KJ00000922445

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[title in Japanese]

Article type: Appendix
2004 Volume 60 Issue 5 Pages 744-
Published: May 20, 2004
Released on J-STAGE: June 30, 2017

DOIhttps://doi.org/10.6009/jjrt.KJ00000922446

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[title in Japanese]

Article type: Appendix
2004 Volume 60 Issue 5 Pages 745-
Published: May 20, 2004
Released on J-STAGE: June 30, 2017

DOIhttps://doi.org/10.6009/jjrt.KJ00000922447

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[title in Japanese]

Article type: Appendix
2004 Volume 60 Issue 5 Pages 745-746
Published: May 20, 2004
Released on J-STAGE: June 30, 2017

DOIhttps://doi.org/10.6009/jjrt.KJ00000922448

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[title in Japanese]

Article type: Appendix
2004 Volume 60 Issue 5 Pages 746-
Published: May 20, 2004
Released on J-STAGE: June 30, 2017

DOIhttps://doi.org/10.6009/jjrt.KJ00000922449

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[title in Japanese]

Article type: Appendix
2004 Volume 60 Issue 5 Pages 747-
Published: May 20, 2004
Released on J-STAGE: June 30, 2017

DOIhttps://doi.org/10.6009/jjrt.KJ00000922450

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[title in Japanese]

Article type: Appendix
2004 Volume 60 Issue 5 Pages 747-
Published: May 20, 2004
Released on J-STAGE: June 30, 2017

DOIhttps://doi.org/10.6009/jjrt.KJ00000922451

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[title in Japanese]

Article type: Appendix
2004 Volume 60 Issue 5 Pages 748-
Published: May 20, 2004
Released on J-STAGE: June 30, 2017

DOIhttps://doi.org/10.6009/jjrt.KJ00000922452

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Article type: Appendix
2004 Volume 60 Issue 5 Pages 749-752
Published: May 20, 2004
Released on J-STAGE: June 30, 2017

DOIhttps://doi.org/10.6009/jjrt.KJ00000922453

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[title in Japanese]

Article type: Appendix
2004 Volume 60 Issue 5 Pages 753-
Published: May 20, 2004
Released on J-STAGE: June 30, 2017

DOIhttps://doi.org/10.6009/jjrt.KJ00000922454

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[title in Japanese]

Article type: Appendix
2004 Volume 60 Issue 5 Pages 754-
Published: May 20, 2004
Released on J-STAGE: June 30, 2017

DOIhttps://doi.org/10.6009/jjrt.KJ00000922455

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[title in Japanese]

Article type: Cover
2004 Volume 60 Issue 5 Pages Cover20-
Published: May 20, 2004
Released on J-STAGE: June 30, 2017

DOIhttps://doi.org/10.6009/jjrt.KJ00000922456

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