Improved imaging of the cervico-thoracic junction in computed tomography

Pyong Kon Cho, Young Hen Lee, You Hyun Kim, Jong Hak Choi, Dong Chul Shin, Tae Kyu Choi, Jang Seob Kim, Ki Hyun Kim, Sun Ung Kim

Research output: Contribution to journalArticlepeer-review


Purpose: To reduce beam hardening artifacts caused by the shoulder joint, we explored new and unique methods to improve the quality of images, such as varying the injection site and changing the position of patients (swimmers position). Materials and Methods: Fifth-four patients underwent neck CT examinations performed in routine and swimmers position and with a 64-slice MDCT scanner in spiral scanning. To examine the difference due to the injection sites of contrast material, subjects were divided into right- and left-side groups. For the evaluation of images, we carried out a subjective and objective assessment based on radiologists' ratings and noise measurement. Results: Images of the lower neck in the swimmers position exhibited less hardening and streak artifacts. The subjective and objective evaluations showed that the swimmers position received higher rating by radiologists and had lower noise level than that of routine position. The swimmers position was the most effective for the diagnosis of the cervico-thoracic junction area. As for the injection site, we obtained better images by an injection of contrast material in the right arm than in the left. Conclusion: CT examination of the lower neck in the swimmers position may improve the quality of image and the effectiveness of diagnosis. The injection of a contrast material to the right side rather than the left side reduced foreign body artifacts.

Original languageEnglish
Pages (from-to)84-89
Number of pages6
JournalYonsei medical journal
Issue number1
Publication statusPublished - 2008 Feb
Externally publishedYes


  • Artifacts
  • Cervico-thoracic junction
  • Computed tomography
  • Swimmers position

ASJC Scopus subject areas

  • General Medicine


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