Cardiac & Lung Nuclear Medicine Exams

This book has three chapters: Heart, lung and radiation protection. In each chapter, indications of scans, radiopharaceuticals the study performance, patient preparation, report and also possible problems were discussed. In addition, in the end of each chapter, many mutliplechoice question (MCa) were expressed. The studying of this book for at medical students, physicians and colleagues is recommended

Focal hot spot induced by a central subclavian line on bone scan

The diagnostic accuracy of nuclear medicine reporting can be improved by awareness of these instrument-related artifacts. Both awareness and experience are also important when it comes to detecting and identifying normal (and abnormal) variants. We present a case of hot spot on the upper right chest in the region of right subclavicular region resulting from injection of radiotracer from central subclavian line. A 52-year-old woman with a history of left breast cancer and recent bone pain was referred to our nuclear medicine department for skeletal survey. Anterior views of chest show a focus of increased radiotracer uptake corresponding to anterior arch of one of the right second rib. The nuclear physician reported it as a focal rib bony lesion and recommended radiological evaluation. As technician later explained, physicians realized that injection site was a central subclavian line on the right side and hot spot on that region is due to injection site. The appearance of both skeletal and soft-tissue uptake depends heavily on imaging technique (such as the route of radiotracer administration) and the interpreting physicians should be aware of the impact of technical factors on image quality

Determination of organ absorbed doses in patients following bone scan with using of MIRD method

Background: Bone scintigraphy is the most commonly performed procedure in nuclear medicine departments. Radiation risk estimates and optimal use of various radiodiagnostic techniques require accurate dosimetry for representative groups of patients. The aim of the present study was to determination of organ absorbed doses in patients following bone scan with using of MIRD method. Material and Methods: In this study, each patient was injected 25 mCi of mTc-MDP99. Patients were imaged with a gamma camera. Whole-body images from patients were acquired at 10, 60, 90, 180 minutes after mTc-MDP99 injection. Regions of interest (ROIs) were drawn around organs for count per minute calculation. Count per minute was converted to activity using the conjugate view counting method. Results: The mean uptake activity was measured in different time periods after injection of mTc-MDP99 for each organ. The absorbed doses per unit injected activity (mrad/mCi) for liver, bladder, spleen, right and left kidney were 7.78, 8.17, 7.96, 30.0 and 30.9 mrad/mCi, respectively. Conclusion: In this study the kidneys and liver received maximum and minimum absorbed doses, respectively. These results were consistent with other studies