Size measurement of the thyroid gland on a magnified pinhole thyroid scan using an ultrasonic device measuring distance from the pinhole to the thyroid gland

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• 作者：Byeong-Cheol Ahn ; Gilhwan Ahn ; Do-Hoon Kim ; Kyoung Dong Kim…
• 关键词：Pinhole image ; Magnification ; Size measurement ; Correction system ; Thyroid scan
• 刊名：Annals of Nuclear Medicine
• 出版年：2015
• 出版时间：February 2015
• 年：2015
• 卷：29
• 期：2
• 页码：111-117
• 全文大小：1,053 KB
• 参考文献：1. Ghanem MA, Elgazzar AH, Elsaid MM, Shehab F. Comparison of pinhole and high-resolution parallel-hole imaging for nodular thyroid disease. Clin Nucl Med. 2011;36(9):770-. CrossRef
  2. McKitrick WL, Park HM, Kosegi JE. Parallax error in pinhole thyroid scintigraphy: a critical consideration in the evaluation of substernal goiters. J Nucl Med. 1985;26(4):418-0.
  3. Cherry SR, Sorenson JA, Phelps ME. Physics in Nuclear Medicine, 4th edn. Philadelphia: Elsevier Saunders; 2012.
  4. Klingensmith WC 3rd, Koo PJ, Summerlin A, Fehrenbach BW, Karki R, Shulman BC, et al. Parathyroid imaging: the importance of pinhole collimation with both single- and dual-tracer acquisition. J Nucl Med Technol. 2013;41(2):99-04. CrossRef
  5. Bahk YW, Jeon HS, Kim JM, Park JM, Chung YA, Kim EE, et al. Novel use of gamma correction for precise (99?m)Tc-HDP pinhole bone scan diagnosis and classification of knee occult fractures. Skeletal Radiol. 2010;39(8):807-3. CrossRef
  6. Connolly LP, Treves ST, Connolly SA, Zimmerman RE, Bar-Sever Z, Itrato D, et al. Pediatric skeletal scintigraphy: applications of pinhole magnification. Radiographics. 1998;18(2):341-1. CrossRef
  7. Wanet PM, Sand A, Abramovici J. Physical and clinical evaluation of high-resolution thyroid pinhole tomography. J Nucl Med. 1996;37(12):2017-0.
  8. Chen A, Bernet V, Carty SE, Davies TF, Ganly I, Inabnet WB, et al. American Thyroid Association Statement on Optimal Surgical Management of Goiter. Thyroid. 2013;24(2):181-. CrossRef
  9. Lee JH, Anzai Y. Imaging of thyroid and parathyroid glands. Semin Roentgenol. 2013;48(1):87-04. CrossRef
  10. Shapiro RS. Panoramic ultrasound of the thyroid. Thyroid. 2003;13(2):177-1. CrossRef
  11. Khairy GA, Al-Saif AA, Alnassar SA, Hajjar WM. Surgical management of retrosternal goiter: Local experience at a university hospital. Ann Thorac Med. 2012;7(2):57-0. CrossRef
  
• 刊物主题：Nuclear Medicine; Imaging / Radiology;
• 出版者：Springer Japan
• ISSN：1864-6433

文摘

Purpose Pinhole has been used for magnification of gamma camera images and is valuable for imaging of small organs, such as thyroid; however, size of the organ cannot be measured on the image due to variable degree of magnification by distance between the pinhole and the organ. The aim of this study was to develop a true size measuring system (TSM system) on magnified pinhole thyroid scan using an ultrasonic sensor. Methods An ultrasonic device capable of measuring the distance from the pinhole to the skin overlying the thyroid gland was manufactured using a ~40?kHz piezoelectric-transducer-based sensor, and its accuracy was tested. An interface program was developed and fused with the ultrasonic device for development of the TSM system. Accuracy of the TSM system for measuring size was tested with phantom images and 35 thyroid scans. Results The ultrasonic device accurately measured the distance from the pinhole to the skin over the thyroid gland and the measured values were highly reproducible (6?cm; 6.02?±?0.04?cm, 8?cm; 8.00?±?0.05?cm, 10?cm; 10.00?±?0.05?cm). Distance on the phantom image corrected by the TSM system was almost the same as the true distance. Size of the thyroid on the pinhole image was larger (+67.3 to 103.1?%) than the true thyroid size on the parallel-hole image and the magnification decreased by increase of the distance between the pinhole and the skin over the thyroid gland. However, size of the thyroid obtained using the TSM system was almost equal (?.1 to +3.6?%) to the true thyroid size on the parallel-hole image. Conclusions We developed the TSM system for magnified pinhole images using a distance measuring ultrasonic sensor. Size of the thyroid on the magnified pinhole image obtained using the system was almost the same as the true thyroid size. The TSM system can be applied to obtain accurate size of the thyroid gland or lesions in the thyroid gland on pinhole thyroid scan.