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Radiochimica Acta

International Journal for chemical aspects of nuclear science and technology

Editor-in-Chief: Qaim, Syed M.

IMPACT FACTOR 2018: 1.339

CiteScore 2018: 1.20

SCImago Journal Rank (SJR) 2018: 0.333
Source Normalized Impact per Paper (SNIP) 2018: 0.720

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Volume 100, Issue 2


Radiotracers for SPECT imaging: current scenario and future prospects

Sudeshna Adak / R. Bhalla / K. K. Vijaya Raj / S. Mandal / R. Pickett / S. K. Luthra
Published Online: 2012-01-16 | DOI: https://doi.org/10.1524/ract.2011.1891


Single photon emission computed tomography (SPECT) has been the cornerstone of nuclear medicine and today it is widely used to detect molecular changes in cardiovascular, neurological and oncological diseases. While SPECT has been available since the 1980s, advances in instrumentation hardware, software and the availability of new radiotracers that are creating a revival in SPECT imaging are reviewed in this paper.

The biggest change in the last decade has been the fusion of CT with SPECT, which has improved attenuation correction and image quality. Advances in collimator design, replacement of sodium iodide crystals in the detectors with cadmium zinc telluride (CZT) detectors as well as advances in software and reconstruction algorithms have all helped to retain SPECT as a much needed and used technology.

Today, a wide spectrum of radiotracers is available for use in cardiovascular, neurology and oncology applications. The development of several radiotracers for neurological disorders is briefly described in this review, including [123I]FP-CIT (DaTSCANTM) available for Parkinson's disease. In cardiology, while technetium-99m labeled tetrofosmin and technetium-99m labeled sestamibi have been well known for myocardial perfusion imaging, we describe a recently completed multicenter clinical study on the use of [123I]mIBG (AdreViewTM) for imaging in chronic heart failure patients. For oncology, while bone scanning has been prevalent, newer radiotracers that target cancer mechanisms are being developed. Technetium-99m labeled RGD peptides have been reported in the literature that can be used for imaging angiogenesis, while technetium-99m labeled duramycin has been used to image apoptosis.

While PET/CT is considered to be the more advanced technology particularly for oncology applications, SPECT continues to be the modality of choice and the workhorse in many hospitals and nuclear medicine centers. The cost of SPECT instruments also makes them more attractive in developing countries where the cost of a scan is still prohibitive for many patients.

Keywords: Nuclear medicine; 99m-Technetium; 123-Iodine; Oncological imaging; Neurological imaging

About the article

* Correspondence address: GE Healthcare Medical Diagnostics, John F Welch Technology Center, Bangalore, 560066, Indien,

Published Online: 2012-01-16

Published in Print: 2012-02-01

Citation Information: Radiochimica Acta International journal for chemical aspects of nuclear science and technology, Volume 100, Issue 2, Pages 95–107, ISSN (Print) 2193-3405 , DOI: https://doi.org/10.1524/ract.2011.1891.

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