利用磁場及共振頻率的造影技術，應用於鼻咽腫瘤有可能波及的部位及軟組織。
它通常用於疾病檢測、診斷和治療監測。
優點：無輻射及無痛，對軟組織解像度較高。
缺點：必須保持靜止掃瞄半小時或以上、價錢較昂貴、噪音大、因磁場限制所以患者體內不能有金屬物體。
MRI is a non-invasive imaging technology that shows detailed images of the body.
It scans are helpful in looking at cancers of the nasal cavities and paranasal sinuses.
It is often used for disease detection, diagnosis, and treatment monitoring.
Advantages: Non-radiation and painless, high resolution of soft tissue.
Disadvantages: Must maintain static scanning for half an hour or more, more expensive, noisy,
no metal objects in the patient’s body due to magnetic field limitations.
正電子電腦掃描是核子醫學掃描檢查的一種，結合正電子掃描和電腦掃描技術，
而追蹤劑會集中跑到代謝功能異常的特定細胞內，再由正電子掃描儀造影得到影像。
可用來進行全身或局部掃描檢查，可以偵測鼻咽有否早期癌細胞病變、
癌細胞有否擴散到身體其他器官，以及癌細胞的擴散程度。
優點：專門用來評估腫瘤的檢查方法，能追蹤早期癌細胞病變，有助定位以便抽取癌細胞組織檢查。
缺點：昂貴；注射帶有低含量輻射的顯影劑，不適合頻密使用。
The PET scan is a type of nuclear medicine scanning, combining PET scanning and CT scanning technology.
It uses a mildly radioactive drug to show up areas of your body where cells are more active than normal.
Advantages: It can be used for whole-body or localized scanning to detect early cancerous lesions
in the nasopharynx, whether the cancer has spread to other organs, and how far the cancer has spread.
Disadvantages: Expensive; injected with a low level of radioactive developer, not suitable for frequent use.
在PET掃描中，發炎或癌細胞會將放射性藥物吸收，
在影像中會像亮燈般變色。亮燈不一定是腫瘤，可能是組織發炎。
但每一次看見影像亮燈時，心總是一沉。
Inflamed or cancer cells show up as bright spots on PET scans because they
have a higher metabolic rate than do typical cells.
It cannot always distinguish between tumors and inflammation due to
similar imaging characteristics. Each time my heart sank when I saw those spots.
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