Bildgebung der Nasennebenhöhlen (NNH) in der heutigen Zeit

Abstract

CT is accepted as the gold standard for pathological-anatomical evaluation of paranasal sinus disease, CT is especially considered an obligatory part of planning surgical procedures. Indications for paranasal sinus CT include trauma, malignant disease, and chronic sinusitis, which accounts for the major part of examinations. Due to the benign character of the disease and the relatively moderate age of the patients involved, the radiation dose of paranasal sinus CT plays an important role. The use of a low-dose spiral CT technique and the reformation of coronal images out of the axial CT data instead of an additional direct coronal scan allow the effective dose of paranasal sinus CT to be reduced to the order of a chest radiogram. MRI is the preferred imaging modality in malignant disease or complications of inflammatory sinus disease that extend beyond the limits of the paranasal sinuses. The clinical value of other imaging modalities, including plain film radiography, ultrasound, or scintigraphy, is limited to special indications.

The paranasal sinuses: three-dimensional reconstruction, photo-realistic imaging, and virtual endoscopy

“…Paranasal sinus CT scans are considered as a gold standard for the evaluation of the paranasal sinuses [15,51]. With the advent of helical CT in the late 1980s, more detailed images were obtained in a short time [55].…”

“…The use of MRI has provided a better view of the soft tissue while reducing artefacts [33]. MRI has become an important imaging modality in the evolution of malignant diseases and complications of inflammatory diseases of the paranasal sinuses [15].…”

Reducing the dose of CT of the paranasal sinuses: potential of an iterative reconstruction algorithm

“…[1][2][3] It is one of the most commonly requested diagnostic imaging tests in clinical routine, and the radiation exposure is of special concern for several reasons. First, it is predominantly performed in younger patients.…”

Current oncologic concepts and emerging techniques for imaging of head and neck squamous cell cancer

“…017/049; S2k guidelines, latest edition 03/2011), which also comprises malignant tumours in the nose and paranasal sinuses, computed tomography in axial sectioning with coronal reconstruction is considered to be the standard procedure [126], [127]. The consensus conference of the S2k Guidelines recommends a "low-dose" protocol for computed tomography in thin axial sectioning allowing multi-planar volume-rendered reconstructions [126], [128], [129]. To date, even volume-rendered reconstructed CT images provide full information for further necessary therapeutic steps [130].…”