Penile plethysmography (PPG) is an objective measure of male sexual arousal in response to the presentation of a series of erotic and neutral stimuli. This measure is now widely recognized as the most reliable means of objectively measuring male sexual arousal to specific stimuli. Many clinicians and researchers consider PPG to be a vital contribution to the assessment and treatment of adult men with paraphilic interests and men who have committed sex crimes. PPG contributes to the clinical assessment of paraphilic interests, appraisal of risk of recidivism, and provides an objective measurement of changes in sexual arousal in response to treatment. There is strong support for the utility of PPG within clinical and legal contexts. This article addresses ways in which PPG has been utilized in the courts as part of expert clinical opinion. History of its use, details regarding admissibility in court, and case law are explored within the legal systems of Canada, the UK and the USA. Support for the inclusion of PPG as expert evidence is provided and judicial misunderstandings on the rationale for PPG use and its clinical utility in forensic assessments are discussed.

中文翻译：

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在法庭上使用阴茎体积描记法：加拿大，英国和美国的做法回顾

阴茎体积描记法（PPG）是对一系列性刺激和中性刺激的反应，对男性性唤起的一种客观测量。现在，该措施被公认为客观地测量男性对特定刺激的性唤起的最可靠手段。许多临床医生和研究人员认为，PPG对于评估和治疗具有嗜好性的成年男子和实施性犯罪的男子至关重要。PPG有助于临床评估亲友性，评估累犯风险，并客观地评估因治疗而引起的性唤起变化。在临床和法律背景下，PPG的效用得到了强有力的支持。本文介绍了PPG在法庭上作为专家临床意见一部分使用的方式。在加拿大，英国和美国的法律体系中探讨了其使用历史，有关法院可受理性的详细信息以及判例法。提供了将PPG纳入专家证据的支持，并讨论了有关PPG使用原理及其在法医评估中的临床实用性的司法误解。