Advanced medical imaging, such as CT, fMRI and PET, has undergone enormous progress in recent years, both in accuracy and utilization. Such techniques often bring with them an illusion of immediacy, the idea that the body and its diseases can be directly inspected. In this paper we target this illusion and address the issue of the reliability of advanced imaging tests as knowledge procedures, taking positron emission tomography in oncology as paradigmatic case study. After individuating a suitable notion of reliability, (...) we argue that PET is a highly theory-laden and non-immediate knowledge procedure, in spite of the photographic-like quality of the images it delivers; the diagnostic conclusions based on the interpretation of PET images are population-dependent; PET images require interpretation, which is inherently observer-dependent and therefore variable. We conclude with a three-step methodological proposal for enhancing the reliability of advanced medical imaging. (shrink)

Bakgrunn: Preimplantasjonsgenetisk diagnostikk er en genetisk undersøkelse av befruktede egg før de settes inn i livmoren i forbindelse med assistert reproduksjon. Hensikten med PGD er å unngå at det fremtidige barnet får en alvorlig arvelig sykdom, og at par som på grunn av arvelig sykdom har vansker med å få barn, kan få avkom. PGD er kontroversielt og et sentralt tema for den pågående vurderingen og revisjonen av bioteknologiloven.Metode: Paradoksteori anvendes for å identifisere og analysere noen av kontroversene ved PGD. (...) Det skilles mellom tilsynelatende paradokser, antinomier og aporier. Materialet er offentlige dokumenter, debattinnlegg og faglitteratur.Resultater: Det finnes en rekke tilsynelatende paradokser på PGD-ens område, slik som at PGD gjøres selv om det er svært liten sannsynlighet for at det blir født et alvorlig sykt barn, og at det gjøres PGD for mindre alvorlige sykdommer når forutsetningen for PGD er alvorlig arvelig sykdom. Samtidig finnes det også antinomier: At PGD gir rett til helsehjelp uten at det eksisterer noen pasient, og at PGD gjennomføres selv ved høye kostnader og lav suksessrate. Om embryoet og fosteret har moralsk status og rett på beskyttelse, synes å utgjøre en apori.Konklusjon: Å formulere moralske utfordringer som paradokser kan være en fruktbar måte å tydeliggjøre utfordringer og motsetninger på. Dessuten kan det styre innsatsen: Vi bør bestrebe oss på å rydde opp i tilsynelatende paradokser, jobbe hardere med grunnlagsutfordringene ved antinomier og til en viss grad akseptere motsetningene ved aporiene.Nøkkelord: Preimplantasjonsgenetisk diagnostikk, paradoks, antinomi, aporiEnglish summary: PGD's ParadoxesBackground: Pre-implantation genetic diagnosis is a genetic test of embryos before implantation as part of in vitro fertilization. The purpose of using PGD is to help people avoid having children with serious genetic disease and to help those with genetically based infertility to have children. PGD has been controversial and is assessed as part of the revision of the Norwegian biotechnology act.Method: Paradox theory is used to identify and analyse controversies with PGD. It distinguishes between resolvable paradoxes, antinomies and aporias. The material comprises official documents, public debates, and professional publications.Results: Many resolvable paradoxes are identified with PGD, such as that PGD is done even in cases where there is very little chance that a seriously ill child will be born and in case of diseases that are not considered to be «serious inheritable disease,» as required by the law. At the same time, there are antinomies: PGD is subsumed within a patient's rights even if there is no patient, and PGD is done even when the success rate is low and the expenses are high. Whether the embryo and the foetus have a right to protection appears to be an aporia.Conclusion: Analysing moral problems in terms of paradoxes may be a fruitful way of displaying challenges and conflicts. Moreover, it may give focus and direction to our endeavours. That is, we should try to resolve the resolvable paradoxes and work harder with the conflicts of the antinomies, and, to a certain extent, to accept the antagonisms of the aporias. (shrink)

The number of diagnoses and the number of persons having diagnoses have increased substantially, and studies indicate that diagnoses are given or upheld even if they are unwarranted, that is, that they do not satisfy professionally accepted diagnostic criteria. In this article, the authors investigate the ethics of withholding and withdrawing unwarranted diagnoses. First, they investigate ethical aspects that make it difficult to withhold and to withdraw such diagnoses. Second, they scrutinize whether there are psychological factors, both in persons/patients and (...) healthcare professionals, making it difficult to withdraw and withhold unwarranted diagnoses. Lastly, they use recent elements of the withholding-versus-withdrawing treatment debate in medical ethics to investigate whether there are any differences between withholding and withdrawing treatment and withdrawing and withholding unwarranted diagnoses. The authors conclude that it is crucial to acknowledge and address all these issues to reduce and avoid unwarranted diagnoses. (shrink)