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Nuclear Medicine-topics

Single-scan rest/stress imaging with 99mTc-Sestamibi and cadmium zinc telluride-based SPECT for hyperemic flow quantification: A feasibility study evaluated with cardiac magnetic resonance imaging.

By | Nuclear Medicine-topics | No Comments

This study  was conducted to evaluate whether the hyperemic myocardial blood flow (MBF) can be estimated using cadmium zinc telluride (CZT)-based single-photon emission computed tomography (SPECT) cameras with a single, rapid rest/stress dynamic scan. Dynamic contrast-enhanced (DCE) cardiac magnetic resonance imaging (MRI) was used as a reference modality for flow measurement.

 

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Incremental value of SPECT/CT over planar bone scan in the evaluation of skull base osteomyelitis: A potentially fatal disease in diabetics

By | CT-Topics, Nuclear Medicine-topics | No Comments

A 55-year-old male diabetic patient presented to the ENT clinic with symptoms of severe earache and dizziness that progressively increased over 3 weeks. He also had low grade fever for the last 5 days. He was diabetic since 14 years, and on 20 units of insulin/day for the last 8 years. He also had history of left foot pain and swelling since last 2 years. A planar bone scan done with 20 mCi (740 MBq) 99m Tc-MDP using a GE Mill VG dual head gamma camera with acquisition in the continuous mode at a speed of 15 cm/min showed no obvious abnormality in the skull base region

Workflow and Scan Protocol Considerations for Integrated Whole-Body PET/MRI in Oncology

By | MRI-Topics, Nuclear Medicine-topics | No Comments

Integrated PET/MRI systems open exciting possibilities for clinical and research applications. However, compared with PET/CT, PET/MRI is a complex technique resulting in new problems and challenges, especially regarding workflow, scan protocols, and data analysis. This complexity applies in particular to examinations in oncology with partial- or whole-body coverage extending over several bed positions. Unlike diagnostic PET/CT, for which the clinical CT protocols can largely be copied from stand-alone CT, the design of a diagnostic MRI
protocol for partial- or whole-body coverage is more complex and has to be adapted to the special requirements of PET/MRI to be both time-efficient and comprehensive. Here, we describe basic considerations concerning workflow, imaging protocols, and image analysis for whole-body PET/MRI in oncology, based on our experience with the first integrated PET/MRI
scanner.

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A work observation study of nuclear medicine technologists: interruptions, resilience and implications for patient safety

By | Nuclear Medicine-topics | No Comments

Errors by nuclear medicine technologists during the preparation of radiopharmaceuticals or at other times can cause patient harm and may reflect the impact of interruptions, busy work environments and deficient systems or processes. We aimed to: (a) characterise the rate and nature of interruptions technologists experience and (b) identify strategies that support safety.

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Honda sign

By | Nuclear Medicine-topics | No Comments

In the sacrum, stress fractures are associated with osteoporosis or prior radiation therapy to the pelvis (an insufficiency fracture). The osteoporotic sacrum develops a characteristic fracture with fracture lines running vertically through the left and right sides of the bone just medial to the SI joints, in conjunction with a transverse fracture just below the level of the SI joints. The fractures appear as a hot, geographic lesions confined to the sacrum and often have a characteristic “butterfly” or “Honda sign” appearance. Plain film are typically normal, but may show a sclerotic lesion.