TOPIC INSIGHT • ന㧋ኼ〛 2019 UMAGAZINE 20 • 澳大ᑓゆ 24 ˕大⊝②㦗↹ ⬃ᐑእゐ䢬㬟ೡ↷ נ ᕔ˓個˷⾾ⅰ研 㦕↷ǎǗⓥˍ個ᒴۙ 㡗 ܻݩ Ѧྕ ⅰ ܻݩ ዀ ࣮ב Ǎ⇀㠙ྕ Ӎኻ㢡۠ྭ ᕧⴵύ㍇ 㭓ⅰ㟘發ǎ⃚̿ ۩ኡዝᒿ䢬㐛個 ࣮ܻݩ ͞۽ ˷ ঁػ ዀ ܻݩ ⃚̿ב 䢬ᴿྭ ኻ㢡ྕ Ӎ䢬ྷ ⡈ۙ 㡗 ܻݩ Ѧྕ 䢬ዞ ڌ ഭ⃚ Ჱ ⅰҎᫎ能؛ ݶ 㕵٨☃ༀǎǘⓥ̡ 個㦕↷ כ ᒴ〲〘 ݶ ⽔㐢ˍ台૦㐗ⅰ૦㖁ಡᬞ Ѡӵǎつӵ࣮ ҵ⚕ⅰ ࡘ 㖁ಡ⦾平ᖱᬞ Ѡӵኻ㢡ᕅ૦Ι㪍ಞ䢬ઌኡዝӵ ⅰ㤇ᐉༀ䢬❰⡈͞ 㡆Χྕ Ӎࣰ ⢍Ǎ᪾ Χ㎔ഥؓ 㕵ᆖ✫≽ኡዝᒿ㟠ǎ㬟ೡຂ ⚭୬〣⫕ⴖˍ೮Պ܅〔⽔つᬞѠӵⅰ ۆ ྉ䢬˧ೌ ⼼ॺ㬟ೡⅰ ࡘ ಞ㣊⤾ᑘ൪ ኡዝӵ˔՜εくΎǎ application.’ In the assessment of a tumour, the doctor can prescribe a positron emission tomography (PET) scan, where glucose labelled with radioactive fluorine is injected into the patient’s body. Since the malignant tumour usually absorbs more glucose than normal tissues, the doctor can pinpoint the location of the tumour and assess the severity of the condition by detecting and quantifying the unusually ‘bright spots’. Three Major Research Projects According to Prof Mok, the lab currently has three major research projects. The first is the development of an active breathing controller to remove respiratory artefacts and related image acquisition and post-processing software. When the patient is scanned, this controller can suspend the patient’s breathing while collecting images, thereby removing respiratory artefacts, improving the quality of imaging, and enabling more accurate quantification of the lesions. The second project is to design and develop a multi-purpose, multi-pinhole collimator that can collect more gamma photons than traditional single-pinhole and parallel-hole collimators. This collimator can enhance the sensitivity of the scanner, which can in turn reduce image noise, radiation dose or scanning time. The lab has commissioned a Dutch company to customise a prototype of the collimator. The device has already been installed on the lab’s single-photon computed tomography (CT) scanner and is undergoing further evaluation. 㬟ೡᕔˍ台ⁱ澳㟑㜻㕕㡕ᆳ㈊ⅰ⽜ཕ ࡘ ಞ發ഥ 㣊⤾ᑘ൪ኡዝ The lab has a SPECT/CT scanner, which was donated by Kiang Wu Hospital ⬃ᒔ⭑ᐑእ ॰ݶ 㡴ⅰ研൨Ỽ२㢂ᣃ Prof Greta Mok’s team has won many international awards
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