Dose limitation is one of the vital principles in

radiation protection regulation. The use of that Low-dose chest CT can be a screening

method of choice for early detection of pulmonary cancer

Atanasov, Zvonko

Bozinovska, Biljana

Manoilov, Mihajlo

Mitrev, Zan

Pejkovik, Danijela

Stojanoski, Darko

Veljanovska, Lidija

UGD Academic Repository

LOW - DOSE CT OF THE CHEST AS A SCREENING METHOD  FOR EARLY DETECTION OF PULMONARY CANCERD. Pejkovik, D. Stojanoski, M. Manoilov, L. Veljanovska, Z. Atanasov, B. Bozinovska, Z. MitrevStandard CT protocol Low-dose CT protocolLow-dose CT protocolLow-dose CT protocolStandard CT protocolStandard CT protocolINTRODUCTION: Dose limitation is one of the vital principles in radiation protection regulation. PURPOSE:  The use of that Low-dose chest CT can be a screening method of choice for early detection of pulmonary cancer. SUBJECTS AND METHODS: During 5 days, we studied 50 patients with different risk factors like: 50+ years old, smokers, cough. We used a 64 Light Speed VCT – GE scanner. A modified Single breath - hold Routine chest – Low dose protocol was used for every patient. The pitch & speed, the kV and mA were reduced.Parameters Standard protocol Low-dose protocolkV 120 80mA 330 75Scan type helical helicalRot. time 0.6 1.0Rot length Full FullDetector coverage 40.0 mm 40.0 mmThickness 5.0 mm 5.0 mmPitch & Speed 1.375:1/55.00 0.516:1/20.62Interval 5.00 mm 5.00 mmSFOV Large body Large bodyDLP 570,13 mGy-cm 249,36 mGy-cmTotal exposure time 4.6 s 19.4 sRESULTS: Despite the reduced dosage, we got a satisfactory image quality with good resolution of the slices which was fully acceptable and sufficient for conducting a diagnosis. Radiation doses (based on weighted-CT–dose index) from Standard - dose CT and Low - dose CT (50%–reduced-dose CT) were DLP 570,13 mGy-cm and 249,36 mGy-cm. CONCLUSION: Low-dose CT of the chest appears to be acceptable as a screening method in early detection of pulmonary cancer, even with a 50% reduction in radiation dose.

Low - dose CT of the chest as a screening method for early detection of pulmonary cancer

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