By Peter F. Sharp, Howard G. Gemmell, Alison D. Murray
Nuclear medication performs a vital function in sufferer care and this e-book is an important advisor for all practitioners to the various thoughts that tell scientific administration. the 1st half covers the medical foundation of nuclear drugs, the remainder of the booklet offers with medical functions. With a selected emphasis all through at the perform of nuclear medication, real-life sensible difficulties encountered in nuclear drugs either in medical perform and within the creation of recent concepts are addressed.
Following at the luck of the former variation, this ebook is usually increased via overlaying parts of improvement in nuclear medication, resembling puppy, equipment of tumor imaging and knowledge processing. All illustrations for this re-creation replicate present criteria of snapshot quality.
This functional strategy leads to a booklet that's beneficial to the radiologist, health practitioner, physicist or technologist beginning in nuclear medication but additionally comprises updated recommendation for the main skilled practitioner.
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Additional resources for Practical Nuclear Medicine
3 Positron Emission Tomography Peter F. 1), until recently the high cost of the equipment and operating expenses had limited it to relatively few centers. With a clearer appreciation of the clinical value of PET ( and Chapter 17) and reimbursement by agencies such as Medicare in the USA, PET is now to be found widely in many countries, although its acceptance by the NHS in the UK has been slower. This chapter will concentrate on the technology behind PET. The clinical applications will be discussed in detail in Chapter 17.
Sampling theory states that, if “aliasing” artifacts are to be avoided, only data containing frequencies of less than half this sampling frequency should be transmitted through the system. This upper limit is known as the Nyquist frequency, f N . The cutoff frequency, f max , of the ﬁlters described above is often made equal to f N , thereby setting any frequencies greater than f N in the input signal to zero and so ensuring that “aliasing” is avoided. Although a modern gamma camera can record spatial frequencies up to 2 cm−1 , in the presence of scattered radiation the upper limit is often less than 1 cm−1 .
4) when the ramp ﬁlter itself is used to optimize resolution. This is because higher count rates and longer collection times are possible when imaging test phantoms. An alternative to introducing smoothing when ﬁltering the proﬁles is to smooth the original data before carrying out the reconstruction process and then use a less smooth (or sharper) ﬁlter on the proﬁles prior to back-projection. This is known as pre-ﬁltering or pre-smoothing. Several different methods have been proposed but none has really become established clinically.