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Идёт набор NCT07730203

Photon-Counting Computed Tomography-Based Urethral Visualization Without Catheterization for Radiotherapy Planning: A Prospective Pilot Study Under ANTHEM

Наблюдательное Prostate Cancer

Ориентир для пациента и семьи

Простыми словами

Автоматическая сводка по структурированным данным реестра. Она помогает сориентироваться, но не заменяет официальный протокол или оценку врача.

Что изучают
В протоколе указаны: image acquisition.
Кому может быть актуально
Состояния в реестре: Prostate Cancer. Базовые параметры: от 18 лет · Мужчины.
Что важно проверить
Возраст, диагноз и пол — только базовые ориентиры. Предыдущее лечение, анализы и другие обязательные условия указаны ниже в критериях участия.
Где проводится
Италия
Следующий шаг
Сохраните исследование, покажите его лечащему врачу и уточните актуальный статус у исследовательского центра. Расходы, документы и поездка →

Обзор

In prostate cancer radiotherapy, it is important to accurately identify and protect healthy organs near the prostate. One of these structures is the urethra, the tube that carries urine from the bladder out of the body. If the urethra receives too much radiation, patients may experience urinary side effects. Current CT scans used for treatment planning do not clearly show the urethra unless a urinary catheter is inserted. While a catheter can improve visibility, it may cause discomfort, increase the risk of infection, and slightly change the natural position of the urethra. MRI scans can also help visualize the urethra, but they are not always available and may not fit easily into all treatment workflows. Photon-counting CT (PCCT) is a new type of CT scanner that produces higher-quality images with better detail. This technology may allow doctors to see the urethra without using a catheter. The purpose of this pilot study is to investigate whether PCCT can reliably visualize the urethra in prostate cancer patients without the need for catheter insertion. If successful, this approach could make treatment planning more comfortable and less invasive while helping doctors better protect healthy tissues during radiotherapy.

Вмешательства

  • Другое image acquisition
    Two sets of images will be acquired on TC photon counting: the first without a catheter, and the second after catheter placement by healthcare personnel. Comparison between images with and without catheter

Первичные конечные точки

  • quality of imaging [Срок оценки: Day of TC acquisition]
Вторичные конечные точки (5)
  • evaluate inter-observer agreement of urethral contours generated on non-catheter PCCT [Срок оценки: immediately after TC acquisition]
  • compare non-catheter urethral contours with catheter-based reference contours [Срок оценки: immediately after TC acquisition]
  • assess contouring confidence and contouring time across different PCCT reconstruction approaches [Срок оценки: immediately after TC acquisition]
  • explore segmental urethral visualization along its anatomical course. [Срок оценки: immediately after TC acquisition]
  • Quantitative contour-derived parameters [Срок оценки: immediately after TC acquisition]

Критерии участия

Критерии включения

  • Prostate cancer candidate to radiotherapy
  • Written informed consent.
  • Eligibility for urethral catheter placement according to institutional practice

Критерии исключения

  • Active or suspected urinary tract infection.
  • Known urethral stricture or recent urethral surgery
  • Contraindication to catheter placement.

Критерии приведены из реестра в оригинале (на английском). Окончательную оценку соответствия проводит исследовательский центр.

Здоровые добровольцы: Нет

Дизайн исследования

Модель наблюдения
Когортное

Центры проведения

Италия · 1 центр
  • IRCCS Humanitas Research Hospital — Rozzano

Публикации

  • Shah KD, Zhou J, Roper J, Dhabaan A, Al-Hallaq H, Pourmorteza A, Yang X. Photon-counting CT in cancer radiotherapy: technological advances and clinical benefits. Phys Med Biol. 2025 May 16;70(10):10TR01. doi: 10.1088/1361-6560/add4ba. PMID 40328288
  • Willemink MJ, Persson M, Pourmorteza A, Pelc NJ, Fleischmann D. Photon-counting CT: Technical Principles and Clinical Prospects. Radiology. 2018 Nov;289(2):293-312. doi: 10.1148/radiol.2018172656. Epub 2018 Sep 4. PMID 30179101
  • Yoshimura T, Okubo K, Takase Y, et al. Visualizing the urethra by magnetic resonance imaging without catheterization: Post-urination MRI technique. European Journal of Radiology Open. 2021 Jul;8:100382
  • Ong WL, Allan Hupman M, Davidson M, Ruschin M, Detsky J, Liu S, Vesprini D, Loblaw A. Urethra contouring on computed tomography urethrogram versus magnetic resonance imaging for stereotactic body radiotherapy in prostate cancer. Clin Transl Radiat Oncol. 2023 Dec 30;45:100722. doi: 10.1016/j.ctro.2023.100722. eCollection 2024 Mar. PMID 38234697

Идентификаторы

NCT: NCT07730203 · PURE-CT/ANTHEM

Первоисточники (государственные реестры)

Открыть это исследование на ClinicalTrials.gov ↗