Coronal multiplanar reconstruction view from isotropic voxel data sets obtained with multidetector-row CT: assessment of detection and size of mediastinal and hilar lymph nodes.

Takenori Kozuka; Noriyuki Tomiyama; Takeshi Johkoh; Osamu Honda; Mitsuhiro Koyama; Seiki Hamada; Hironobu Nakamura; Shuji Yamamoto; Takashi Matsumoto

PubMed · 12801140

Coronal multiplanar reconstruction view from isotropic voxel data sets obtained with multidetector-row CT: assessment of detection and size of mediastinal and hilar lymph nodes.

Takenori Kozuka·Noriyuki Tomiyama·Takeshi Johkoh·Osamu Honda·Mitsuhiro Koyama·Seiki Hamada·Hironobu Nakamura·Shuji Yamamoto·Takashi Matsumoto

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Abstract

OBJECTIVE: To assess the detection and size of mediastinal and hilar lymph nodes by multiplanar reconstruction (MPR) view from isotropic voxel data sets obtained with multidetector-row computed tomography (MDCT). MATERIALS AND METHODS: Thin-section CT of 27 patients with mediastinal or hilar lymph node swelling was obtained with a 25.6-cm FOV, 512 x 512 matrix, and two protocols: A) 0.5-mm collimation, 0.3-mm interval, and B) 2-mm collimation, 1-mm interval. MPR views with a 0.5-mm slice thickness were obtained from these two data sets. Postcontrast axial CT used 5-mm collimation (set C). Two observers evaluated the presence and cranio-caudal length of swollen lymph nodes. Two other board-certified chest radiologists evaluated all three sets and established a gold standard by consensus. RESULTS: The accuracy of detection was 76%, 73%, and 68% for sets A, B, and C, respectively. There was a significant difference between sets A and C (McNemar's test: p<0.05) but not between sets A and B or B and C (p>0.05). The cranio-caudal length of lymph nodes was significantly correlated with the gold standard only in set A (Pearson's correlation coefficient: r=0.53, p<0.05). CONCLUSION: Non-contrast enhanced coronal MPR views constructed from isotropic voxel data sets may be substituted for axial enhanced CT for the evaluation of mediastinal and hilar lymph nodes.

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Takenori Kozuka, Noriyuki Tomiyama, Takeshi Johkoh, Osamu Honda, Mitsuhiro Koyama, Seiki Hamada, Hironobu Nakamura, Shuji Yamamoto, Takashi Matsumoto. Coronal multiplanar reconstruction view from isotropic voxel data sets obtained with multidetector-row CT: assessment of detection and size of mediastinal and hilar lymph nodes.. https://pubmed.ncbi.nlm.nih.gov/12801140/

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