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• Clinical Article •
The comparative study of CT and MR enhancement images after induction chemotherapy of nasopharyngeal carcinoma
LUO Wen  TANG Ming  RUAN Pei-gang  LUO Ke-jin 

DOI:10.3969/j.issn.1674-8034.2013.05.003.


[Abstract] Objective: To study the medical imaging examination method for drawing the outline of the target areas after induction chemotherapy of nasopharyngeal carcinoma.Materials and Methods: CT and MR enhancement images of 21 patients with nasopharyngeal carcinoma after induction chemotherapy were collected. The transverse images of MR T1WI enhancement, T2WI fat-suppression and CT enhancement (three kinds of images) were observed and analyzed by two experienced doctors.Result: The primary lesion is disappeared after induction chemotherapy in 2 cases. Primary tumor lesions were showed in 19 cases and a total of 131 sections. On the three kinds of images, the lesion showed clearly boundary in 117 sections (89.3%), 103 sections (78.6%) and 52 sections (39.7%) respectively. The lesion simultaneously displayed well-defined boundary on three kinds of images in 5 cases, These lesions of 5 cases showed obvious reinforcement on the contrast-enhanced CT images. The longus capitis was invaded in 10 cases on MR images, only 4 obviously enhancement cases on enhanced CT images. It is not significant differences between CT images and MR images in displaying the invasion of basis cranii.Conclusions: MRI is superior to CT in showing the boundary of nasopharyngeal carcinoma and judging the invasion of longus capitis. We can directly draw the outline of the target areas on the CT images, when the enhancement of the lesion is obvious and the fringe is clear on enhanced-CT images, or the primary lesion is disappeared after induction chemotherapy, or the basis cranii is widely invaded.
[Keywords] Nasopharyngeal neoplasms；Magnetic resonance imaging；Tomography, X-ray computed；Case-control studies

LUO Wen Department of Oncology, the Affiliated Hospital of Zunyi Medical College, Zunyi 563099, China

TANG Ming Department of Oncology, the Affiliated Hospital of Zunyi Medical College, Zunyi 563099, China

RUAN Pei-gang Department of Oncology, the Affiliated Hospital of Zunyi Medical College, Zunyi 563099, China

LUO Ke-jin * Department of Medical Imaging, the Affiliated Hospital of Zunyi Medical College, Zunyi 563099, China

*Correspondence to: Luo KJ, E-mail: lkj560630@163.com

Conflicts of interest   None.

Received  2013-07-02
Accepted  2013-08-03
DOI: 10.3969/j.issn.1674-8034.2013.05.003
DOI:10.3969/j.issn.1674-8034.2013.05.003.

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