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- Bleichrodt, Han, et al.
(författare)
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Characterizing QALYs by Risk Neutrality
- 1997
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Ingår i: Journal of Risk and Uncertainty. - : Springer. - 1573-0476 .- 0895-5646. ; 15:2, s. 107-114
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Tidskriftsartikel (refereegranskat)abstract
- This paper shows that QALYs can be derived from more elementary conditions than thought hitherto in the literature: it suffices to impose risk neutrality for life years in every health state. This derivation of QALYs is appealing because it does not require knowledge of concepts from utility theory such as utility independence. Therefore our axiomatization greatly facilitates the assessment of the normative (non)validity of QALYs in medical decision making. Moreover, risk neutrality can easily be tested in experimental designs, which makes it straightforward to assess the descriptive (non)validity of QALYs. Copyright 1997 by Kluwer Academic Publishers
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| 2. |
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| 3. |
- Galvin, J. M., et al.
(författare)
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Warping CT scans from nontreatment to treatment position
- 1997
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Ingår i: Radiation oncology investigations (Print). - 1065-7541 .- 1520-6823. ; 5:4, s. 206-212
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Tidskriftsartikel (refereegranskat)abstract
- This paper describes a cost-effective technique that optimally utilizes all available diagnostic studies for three-dimensional treatment planning. A simulator unit modified to produce cross-sectional images {(simulator-CT} unit) is used to create a reference data set with the patient in the treatment position. Registration software (qsh) brings other diagnostic studies into agreement with this reference data set. Two cases are presented as examples of the use of this technique. Registration of abdominal scans from the same patient demonstrates the warping of a nontreatment position study to the treatment position. The second case is based on paired data sets through the head, in which the diagnostic study was obtained by using a gantry tilt to follow the base of the skull and to avoid sections passing through the teeth. The registration software provides a method for combining diagnostic studies into a single "master" data set. The success of the transformation depends on the operator's ability to identify corresponding anatomic landmarks for different data sets and on the magnitude of the variation in the patient's position from one procedure to the next. Limitations in image quality and the number of cross-sections obtainable from a {simulator-CT} unit can be partially overcome by using the described technique. Thus, the information contained in nontreatment position diagnostic tests can be used accurately for treatment planning at limited cost.
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| 4. |
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| 6. |
- Werst, DW, et al.
(författare)
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Hydrogen atom addition to hydrocarbon guests in radiolyzed zeolites
- 1999
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Ingår i: JOURNAL OF PHYSICAL CHEMISTRY B. - 1089-5647. ; 103:43, s. 9219-9230
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Tidskriftsartikel (övrigt vetenskapligt/konstnärligt)abstract
- The formation of H adducts during radiolysis of zeolites containing olefinic and aromatic hydrocarbon guests was demonstrated to occur by H atom transfer from the zeolite to the adsorbed molecules. The H adducts and other paramagnetic radiolysis products
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