Suyon Chang MD, Presenter: Nothing to Disclose

Hye-Jeong Lee MD, Abstract Co-Author: Nothing to Disclose

Sae Rom Hong MD, Abstract Co-Author: Nothing to Disclose

Yoo Jin Hong MD, Abstract Co-Author: Nothing to Disclose

Jin Hur MD, Abstract Co-Author: Nothing to Disclose

Young Jin Kim MD, Abstract Co-Author: Nothing to Disclose

Byoung Wook Choi MD, Abstract Co-Author: Nothing to Disclose

Recently, Half Fourier Single Shot Turbo Spin-Echo (HASTE) imaging with short TE and short inter-echo spacing, has found increased use in lung imaging. The features of HASTE include fast imaging, little motion artifacts, high signal intensity of the fat, and by using parallel imaging, margin blurring can be reduced. Therefore in this study, we evaluated the usefulness of HASTE alone for the evaluation of local tumor invasion of lung cancer.

Institutional review board approval was obtained for this retrospective study, and informed consent was waived. The patients with lung cancer underwent lung MRI for evaluation of local tumor invasion between Jan 2008 – Dec 2011. In total 33 patients (31 men and 2 women; mean age = 63.6 ± 11 years) were enrolled, all of whom underwent surgery in this study. Two observers (with 3 and 5 years of experience in chest radiology, respectively) independently and blindly reviewed MR images for the presence of mediastinal cardiovascular structures, the chest wall, and diaphragm invasion. The gross surgical findings and the pathological findings concerning the adhesion or invasion of mediastinal cardiovascular structures, the chest wall, and diaphragm were recorded, and the pathological findings were used as the standard reference. Diagnostic performance was calculated for each observer.

Seven patients had mediastinal cardiovascular invasion, and the accuracy, sensitivity and specificity of the MR imaging for the presence of mediastinal cardiovascular invasion were 85.7%, 96.2% and 93.9%, respectively, for the first reader and 85.7%, 92.3% and 90.9%, respectively, for the second reader. Thirteen patients had chest wall invasion, and the accuracy, sensitivity and specificity of the MR imaging for the presence of chest wall invasion were 88.2%, 81.3% and 84.8%, respectively, for the first reader and 85.7%, 96.2% and 93.9%, respectively, for the second reader. Two patients had diaphragmatic invasion, and the accuracy, sensitivity and specificity of the MR imaging for the presence of diaphragmatic invasion were all 100% for the both readers.

The HASTE sequence alone demonstrated high diagnostic performance in evaluation of local tumor invasion of lung cancer.

The HASTE sequence is useful as a fast imaging modality for evaluation of local tumor invasion in lung cancer, especially for patients with respiratory difficulty.

Chang, S, Lee, H, Hong, S, Hong, Y, Hur, J, Kim, Y, Choi, B, Usefulness of Half-Fourier Acquisition Single-Shot Turbo Spin-Echo (HASTE) in Evaluation of Local Invasion of Lung Cancer.  Radiological Society of North America 2012 Scientific Assembly and Annual Meeting, November 25 - November 30, 2012 ,Chicago IL. http://archive.rsna.org/2012/12031739.html