公立醫院轉介信預約
歡迎醫管局轉介信預約
歡迎使用醫療券
影像可上載至醫健通電子健康紀錄互通系統
Accept referral letter from HA.
We support the use of Health Care Voucher.
We can upload images to eHRSS.
正電子電腦掃描 （PET-CT）是什麼？
What is PET-CT?
正電子電腦掃描（Positron Emission Tomography - Computed Tomography, PET-CT）是一種結合兩項技術的混合影像掃描。
Positron Emission Tomography - Computed Tomography (PET-CT) is a hybrid imaging scan that combines two technologies.
•正電子掃描 (PET)：屬於「功能性」影像，透過注射微量帶有放射性的追蹤劑（最常用為FDG氟-18去氧葡萄糖），偵測身體細胞的新陳代謝活動。由於癌細胞通常比正常細胞活躍，會吸收更多葡萄糖，因此PET能標示出這些異常代謝的區域。
•電腦掃描 (CT)：屬於「結構性」影像，利用X光從多角度拍攝，組成身體內部的詳細3D圖像，能清晰顯示器官和組織的形態、大小和位置。
兩者結合後，PET-CT能將顯示代謝活動的功能性影像（PET）與顯示解剖結構的影像（CT）融合，
從而精確定位出異常活躍的細胞（如癌細胞）位於身體的哪個具體位置。
•Positron Emission Tomography (PET): This is a type of "functional" imaging that detects metabolic activity in body cells by injecting a small amount of a radioactive tracer (most commonly FDG, fluorine-18 deoxyglucose). Since cancer cells are usually more active than normal cells and absorb more glucose, PET can highlight these areas of abnormal metabolism.
•Computed Tomography (CT): This is a type of "structural" imaging that uses X-rays taken from multiple angles to create detailed 3D images of the inside of the body. It clearly shows the shape, size, and location of organs and tissues.
By combining both modalities, PET-CT integrates the functional imaging that shows metabolic activity (PET) with the anatomical imaging that reveals structural details (CT), thereby accurately pinpointing the specific locations of abnormally active cells (such as cancer cells) in the body.
GE Discovery IQ GEN 2 PET-CT
此正電子掃描機器擁有業界最高NEMA 靈敏度及最高F18 NECR，廣闊的探測器視野，個人化劑量使用，有效去除金屬偽影，使SUV準確度和訊噪比提升兩倍，令掃描更快速準確，更低劑量，提高病人舒適度。
This PETCT machine has the Highest NEMA sensitivity and Highest clinical NECR for F18 in class, with personalized dose reduction, achieving 2 times improvement in SUV mean quantitation accuracy and Signal to Noise Ratio, allowing faster scans at lower doses and greater patient comfort.
本中心提供的追蹤劑 :
Tracers provided by our center:
• FDG氟-18去氧葡萄糖(F18-FDG)
• 氟18-前列腺特異性膜抗原(F18-PSMA)
• 碳11-乙酸鹽(C11-Acetate)
• FDG氟-18去氧葡萄糖(F18-FDG) + 碳11-乙酸鹽(C11-Acetate) (雙追蹤劑檢查)
PET-CT的準確性?Accuracy of PET-CT ?
PET-CT被公認為目前最靈敏的影像診斷工具之一。在腫瘤學應用上，它能精準地偵測、分期並評估多種癌症（如肺癌、淋巴癌、大腸癌等）的狀況。PET-CT的優勢在於能夠預先在器官出現結構性改變前，就發現功能性、代謝性的早期病變，達致早期診斷的效果。
PET-CT is recognized as one of the most sensitive imaging diagnostic tools currently available. In oncology applications, it can accurately detect, stage, and assess various cancers (such as lung cancer, lymphoma, and colorectal cancer). The advantage of PET-CT lies in its ability to identify functional and metabolic early lesions before structural changes occur in the organs, achieving early diagnosis.
