Method Of Adjust The Scan Speed To Ensure The Quality Of Bone Scintigraphy

Bone scintigraphy has grown to become the most commonly performedprocedures in nuclear medicine, accounting for over half the single-photonimaging procedures performed in many nuclear medicine departments. Butthe image quality of bone scintigraphy is uneven. Most hospitals performwhole-body bone scan at a fixed scan speed, result in the patients with lowerdose or heavier body weight are difficult to obtain satisfactory images, anddirectly impact on clinical diagnosis. How to ensure the quality of thewhole-body bone scan? Guidelines for whole-body imaging from Society ofNuclear Medicine (SNM) recommend at least1.5million counts (Mcounts)in respective image. However, procedure is complete, there is no guidancefor acquire high-quality image before scintigraphy. Someone have proposedto acquire the preset count (usually of the anterior chest) to calculate thecorresponding scan speed in clinical. But the relationship between them andthe studies of satisfactory imaging results finally obtained has not beenreported. So it’s difficult to use this method to ensure the bone scan quality.Therefore, we did a series of researchs to study the relationship between thepreset count and the scan speed, and how to get the stable, high-qualitywhole body bone scan results.The first chapter of this paper is introduction, introduces the wholebody bone scan and its application, the research background and the maincontents.Chapter2analyzes and compares the relationship between imagequality and the total count of263patients. First, we score the image quality,then use non-parametric statistical tests (Kruskal-Wallis Test) and convertmultiple comparison rank (Dunnett’s t Tests) to compare the difference of the images of different qualities.Chapter3studies when the preset count determined, the relationshipbetween the total count and the scan speed, that is when same patientperform at different scan speeds, the variation of the total count.Chapter4studies the relationship between the preset count and the totalcount in the case of scan speed determined. We have taken in accordancewith commonly used clinical value200mm/min as fixed scan speed. At scanspeed of200mm/min, whether there is a relationship between the presetcount and the total count.Chapter5study the research of chapter3and chapter4to determinehow to use the preset count to calculate different scan speeds.Chapter6validate the method of Chapter5to determine whether themethod is applicable to clinical.Through the above experiments, We have a certain degree ofunderstanding of the method on how to adjust the scan speed to ensure thequality of bone scintigraphy. We believe that by the bone scan improvingmethods, we can get higher image quality.