Filters
Results 1 - 10 of 26716
Results 1 - 10 of 26716.
Search took: 0.051 seconds
Sort by: date | relevance |
Koller, H.
Muenchener Medizin Mechanik G.m.b.H. (MMM) (Germany, F.R.); Deutsches Patentamt, Muenchen (Germany, F.R.)1978
Muenchener Medizin Mechanik G.m.b.H. (MMM) (Germany, F.R.); Deutsches Patentamt, Muenchen (Germany, F.R.)1978
AbstractAbstract
[en] The sterilization of radium needles (applicators) is possible with the device. The system has the simultaneous function of a shielding container (concrete or lead chamber), of a washing vessel and of a sterilization chamber. The shielding container surrounds the cleaning vessel into which the cleaning liquids can be sprayed and extracted again and into which a bactericide gas (ethylene oxide with CO or freon) can be introduced. Due to the poison gas sterilization of the applicators collected in the wash vessel or sterilization chamber, a temperature of 800C is not exceeded so that the soldered points on the applicators do not become loose. (DG)
[de]
Mit der Anlage gelingt die Sterilisation von Radiumnadeln (Applikatoren). Die Anlage hat zugleich die Funktion eines Abschirmbehaelters (Beton- oder Bleikammer), eines Waschbehaelters und einer Sterilisierkammer. Der Abschirmbehaelter umgibt den Reinigungsbehaelter in den die Reinigungsfluessigkeiten einspruehbar sind und wieder abgezogen werden koennen und auch ein bakterizides Gas (Aethylenoxid mit CO oder Freon) eingeleitet werden kann. Durch die Giftgassterilisation der im Waschbehaelter bzw. in der Sterilisierkammer gesammelten Applikatoren wird eine Temperatur von 800C nicht ueberschritten, so dass sich keine Loetstellen an den Applikatoren loesen koennen. (DG)Original Title
Vorrichtung zur Sterilisation von radioaktiven Einlagen fuer medizinische Zwecke
Primary Subject
Source
21 Dec 1978; 10 p; DE PATENT DOCUMENT 1492410/B/
Record Type
Patent
Country of publication
Reference NumberReference Number
INIS VolumeINIS Volume
INIS IssueINIS Issue
Narayanan, Sreeram; Cho, Paul S; MarksII, Robert J
Department of Radiation Oncology, University of Washington School of Medicine Seattle, WA 98195-6043 (United States)2004
Department of Radiation Oncology, University of Washington School of Medicine Seattle, WA 98195-6043 (United States)2004
AbstractAbstract
[en] Intra-operative dosimetry in prostate brachytherapy requires 3D coordinates of the implanted, radioactive seeds. Since CT is not readily available during the implant operation, projection x-rays are commonly used for intra-operative seed localization. Three x-ray projections are usually used. The requirement of the current seed reconstruction algorithms is that the seeds must be identified on all three projections. However, in practice this is often difficult to accomplish due to the problem of heavily clustered and overlapping seeds. We have developed an algorithm that permits seed reconstruction from an incomplete data set. Instead of all three projections, the new algorithm requires only one of the three projections to be complete. Furthermore, even if all three projections are incomplete, it can reconstruct 100% of the implanted seeds depending on how the undetected seeds are distributed among the projections. The method utilizes the principles of epipolar imaging geometry and pseudo-matching of the undetected seeds. The algorithm was successfully applied to a large number of clinical cases where seeds imperceptibly overlap in some projections
Primary Subject
Source
S0031-9155(04)79405-1; Available online at http://stacks.iop.org/0031-9155/49/3483/pmb4_15_012.pdf or at the Web site for the journal Physics in Medicine and Biology (ISSN 1361-6560) http://www.iop.org/; Country of input: International Atomic Energy Agency (IAEA)
Record Type
Journal Article
Journal
Country of publication
Reference NumberReference Number
INIS VolumeINIS Volume
INIS IssueINIS Issue
External URLExternal URL
AbstractAbstract
No abstract available
Primary Subject
Source
Also available online: www.wjnm.org
Record Type
Journal Article
Journal
World Journal of Nuclear Medicine; ISSN 1450-1147;
; v. 3(suppl.1); p. S31

Country of publication
Reference NumberReference Number
INIS VolumeINIS Volume
INIS IssueINIS Issue
AbstractAbstract
No abstract available
Primary Subject
Source
Also available online: www.wjnm.org
Record Type
Journal Article
Journal
World Journal of Nuclear Medicine; ISSN 1450-1147;
; v. 3(suppl.1); p. S138

Country of publication
Reference NumberReference Number
INIS VolumeINIS Volume
INIS IssueINIS Issue
Stannard, Clare; Sealy, Rossall; Hering, Egbert; Korrubel, Jan; Hill, John; Barron, Adrian; Knowles, Ruth, E-mail: clare@curie.uct.ac.za2001
AbstractAbstract
[en] Purpose: To treat children with retinoblastoma, who require whole eye radiotherapy, with a specially designed 125I applicator that irradiates the eye while sparing the surrounding tissues. Methods and Materials: Under general anesthesia, a pericorneal ring is attached to the 4 extraocular muscles, and 4 appendages, each loaded with 125I seeds, are inserted beneath the conjunctiva in-between each pair of muscles and attached anteriorly to the ring. Twenty-nine eyes were treated. Eighteen received a median dose of 28 Gy during 91 hours and 11 received 40 Gy during 122 hours, when the relative biologic effectiveness was taken as 1 instead of 1.5. Six had received prior chemotherapy. Results: Twenty-four eyes were followed up for 2-157 months (median 29). Although 22 eyes responded, local control was achieved in 13 patients, 3 of whom required additional treatment for new tumors; a further 3 required additional treatment for tumor recurrence as well as new tumors. One of these eyes was enucleated for neovascular glaucoma. All 6 Group I-III eyes and 6 of 18 Group V eyes were retained for 2-157 months (median 39), with good vision in 10 eyes. Three developed cataracts 7, 8, and 12 years later, 1 of which has been removed. Conclusions: This is a new way of irradiating the whole eye with a minimal dose to the surrounding tissues. The treatment time is only 5 days. It is effective in Groups I-III, but only 33% of Group V eyes retained vision. No late cosmetic defects occurred
Primary Subject
Source
S0360301601016388; Copyright (c) 2001 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA)
Record Type
Journal Article
Journal
International Journal of Radiation Oncology, Biology and Physics; ISSN 0360-3016;
; CODEN IOBPD3; v. 51(2); p. 399-409

Country of publication
BETA DECAY RADIOISOTOPES, BODY, DAYS LIVING RADIOISOTOPES, DISEASES, ELECTRON CAPTURE RADIOISOTOPES, EYES, FACE, HEAD, IMPLANTS, INTERMEDIATE MASS NUCLEI, INTERNAL CONVERSION RADIOISOTOPES, IODINE ISOTOPES, ISOTOPES, MEDICINE, NEOPLASMS, NUCLEAR MEDICINE, NUCLEI, ODD-EVEN NUCLEI, ORGANS, RADIATION SOURCES, RADIOISOTOPES, RADIOLOGY, RADIOTHERAPY, SENSE ORGANS, THERAPY
Reference NumberReference Number
INIS VolumeINIS Volume
INIS IssueINIS Issue
AbstractAbstract
[en] An investigation was undertaken into possible dose conformity advantages and technical limitations of utilizing radially asymmetric internally applied radiation sources for intensity-modulated brachytherapy (IMBT). A feasible form of a source for IMBT would be a linear source with a high-intensity angular region, with some fractional transmission through the remainder of the source, which inhibits the resolution achievable in intensity modulation. Indexed rotation of the source about its axis would provide radial intensity modulation, which could compensate for variations in the spatial relationship between the source position and location of the target edge. Two treatment situations were simulated - one two-dimensional and one three-dimensional - both utilizing a single source (single catheter). The optimal intensity distribution of the source was determined by simulated annealing optimization using a conformality-based objective. The parameters in the optimization included the angular size of the source high-intensity region, and the fractional transmission through the low-intensity part of the source. Results indicate that limitations in source design suggest an optimal high-intensity resolution of approximately π/4 to π/8. The advantages of IMBT are rapidly reduced when fractional transmission through the low-intensity side of the source is increased. (author)
Primary Subject
Source
S0031-9155(02)35423-X; Available online at the Web site for the journal Physics in Medicine and Biology (ISSN 1361-6560) http://www.iop.org/; Country of input: International Atomic Energy Agency (IAEA)
Record Type
Journal Article
Journal
Physics in Medicine and Biology; ISSN 0031-9155;
; v. 47(14); p. 2495-2509

Country of publication
Reference NumberReference Number
INIS VolumeINIS Volume
INIS IssueINIS Issue
Marks, L.B., E-mail: marks@med.unc.edu
International Conference on Advances in Radiation Oncology (ICARO). Book of extended synopses2009
International Conference on Advances in Radiation Oncology (ICARO). Book of extended synopses2009
AbstractAbstract
[en] Three dimensional (3-D) imaging/planning facilitates the definition of the GTV. It allows us to use CT (or other 3-D imaging such as PET) based anatomic information when designing treatment beams. Detailed 3-D dosimetric and anatomic information can be readily displayed and enables the physician to better select ?optimal? beam orientations and beam shapes. Care must be taken to review the RT fields actually on the patient, since some clinically meaningful information is not included in the imaging (drain sites, scars, palpable induration). Overall, 3-D/conformal planning has been one of the most important advances in clinical radiation oncology. The limitation of this approach relates to the occasional inability to visualize target tissues on CT imaging (e.g. some head and neck sites are not easily visualized on CT, and when the target is largely based on areas of possible microscopic disease such as post-operative breast or rectal cancer). However, even in these cases the imaging can help to define critical normal tissues to be spared
Primary Subject
Source
International Atomic Energy Agency, Division of Human Health, Vienna (Austria); American Association of Physicists in Medicine (AAPM), One Physics Ellipse, College Park, MD (United States); American Brachytherapy Society (ABS), Reston, VA (United States); American Society for Radiation Oncology (ASTRO), Fairfax, VA (United States); European Society for Therapeutic Radiology and Oncology (ESTRO), Brussels (Belgium); International Association for Radiation Research (IARR), Radiation Biology Center, Kyoto University, Sakyo-ku (Japan); International Commission on Radiation Units and Measurements, Inc. (ICRU), Bethesda, MD (United States); Asia-Oceania Federation of Organizations for Medical Physics (AFOMP), Osaka University, Suita-city (Japan); Asociacion Latinoamericana de Terapia Radiante Oncologica (ALATRO), Cancun (Mexico); European Association of Nuclear Medicine (EANM), Vienna (Austria); European Federation of Organisations for Medical Physics (EFOMP), Udine (Italy); International Network for Cancer Treatment Research (INCTR), Brussels (Belgium); International Organization for Medical Physics (IOMP), Kogarah, NSW (Australia); Trans Tasman Radiation Oncology Group (TROG), Department of Radiation Oncology, Calvary Mater Newcastle, NSW (Australia); International Union Against Cancer (UICC), Geneva (Switzerland); 353 p; 2009; p. 5-6; International Conference on Advances in Radiation Oncology (ICARO); Vienna (Austria); 27-29 Apr 2009; IAEA-CN--170/002; Invited paper; 6 refs
Record Type
Report
Literature Type
Conference
Report Number
Country of publication
Reference NumberReference Number
Related RecordRelated Record
INIS VolumeINIS Volume
INIS IssueINIS Issue
AbstractAbstract
[en] A delivery system for interstitial radiation therapy is described, comprising: an integral elongated member made from a material which is absorbable in living tissue the member having a length substantially greater than its width, and a plurality of radioactive sources
Primary Subject
Source
28 Mar 1989; vp; US PATENT DOCUMENT 4,815,449/A/; Patent and Trademark Office, Box 9, Washington, DC 20232
Record Type
Patent
Country of publication
Reference NumberReference Number
INIS VolumeINIS Volume
INIS IssueINIS Issue
AbstractAbstract
[en] Purpose: The feasibility of high dose rate iridium afterloaded molds in the treatment of skin tumors. Methods and Materials: Expanded silicone rubber and bronchial applicator tubes were used in the construction of various molds. The number of tubes used and the separation between them depends on the size and area to be treated. Source dwell position and time are set to follow Paterson--Parker rules. Single plane expanded silicone rubber molds between 15 x 15 mm and 60 x 70 mm were used in 120 different sites, and of the others, seven were perspex double molds, two were cylindrical applicators, and one was a partially shielded intranasal applicator. One hundred and thirty lesions of various site and histology were treated in all. After exclusion of treatments that were combined with either external beam or chemotherapy, 106 lesions (76 patients) were evaluated. Results: Full response was obtained in all but four basal cell carcinomas. The acute reaction ranged from moist desquamation (27 sites) to erythema only. Follow-up at 5 or more months revealed no changes whatever in 47 sites; 53 showed an excellent cosmetic outcome, although slight changes in pigmentation or minimal atrophy was demonstrable and 6 sites became noticeably atrophic with patchy pigmentation. For 9.6 months of average follow-up time, no recurrences have been observed. Conclusion: The high-dose-rate iridium-loaded skin applicators offer the possibility of improved therapeutic ratio in the treatment of superficial skin tumors. With the availability of a high-dose-rate afterloader this technique is simple and straightforward
Primary Subject
Source
0360301694004854; Copyright (c) 1995 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA)
Record Type
Journal Article
Journal
International Journal of Radiation Oncology, Biology and Physics; ISSN 0360-3016;
; CODEN IOBPD3; v. 31(4); p. 967-972

Country of publication
BETA DECAY RADIOISOTOPES, BETA-MINUS DECAY RADIOISOTOPES, CARCINOMAS, DAYS LIVING RADIOISOTOPES, DISEASES, ELECTRON CAPTURE RADIOISOTOPES, HEAVY NUCLEI, IMPLANTS, INTERNAL CONVERSION RADIOISOTOPES, IRIDIUM ISOTOPES, ISOMERIC TRANSITION ISOTOPES, ISOTOPES, MEDICINE, MINUTES LIVING RADIOISOTOPES, NEOPLASMS, NUCLEAR MEDICINE, NUCLEI, ODD-ODD NUCLEI, RADIATION SOURCES, RADIOISOTOPES, RADIOLOGY, RADIOTHERAPY, THERAPY, YEARS LIVING RADIOISOTOPES
Reference NumberReference Number
INIS VolumeINIS Volume
INIS IssueINIS Issue
AbstractAbstract
No abstract available
Primary Subject
Source
3. national conference on synchotron radiation instrumentation; Upton, NY (USA); 12-14 Sep 1983; Published in summary form only.; CODEN: NIMRD.
Record Type
Journal Article
Literature Type
Conference
Journal
Nuclear Instruments and Methods in Physics Research; ISSN 0167-5087;
; v. 222(1/2); p. 5

Country of publication
Reference NumberReference Number
INIS VolumeINIS Volume
INIS IssueINIS Issue
1 | 2 | 3 | Next |