Predictive value of attenuation coefficients measured as Hounsfield units
on noncontrast computed tomography during flexible ureteroscopy with holmium laser lithotripsy: a single-center experience.
The Hounsfield Unit
(HU) is linked directly to the attenuation value and the applied energy, at any effective energy used in the CT scanner .
of some related substances  are shown in Table 1.
In CT scans, the Hounsfield Unit
(HU) is used as a measure of the relative density of a certain area of tissue.
For the degrees of parenchymal attenuation and enhancement, Hounsfield unit
(HU) values were measured in both thyroid lobes, by using regions of interest (ROIs) on nonenhanced and contrast-enhanced CT images, respectively, and then averaged (Figure 1).
density was calculated to determine urinary stone composition, as described previously .
Each divided lung section was categorised according to their Hounsfield unit
(HU) into hyperinflated (-1000~-900 HU), well-aerated (-900~-500 HU), poorly-aerated (-500~-100 HU) and non-aerated (-100~100 HU) volumes and analysed with Rapidia[R] 2.7 (3DMED, Seoul, Korea), a volume- and Hounsfield unit-calculating software.
The unlabelled dark circular spot to the right of root D is a dead root as indicated by its Hounsfield unit
value (CT scanner image number).
A board with wet pockets is shown in the CT-scanning images in clear color and with low values of the Hounsfield Unit
(HU) or "CT number".
To optimize the CT angiography protocol, we conducted a systematic study divided into two parts with the aim to determine the kV-specific minimal IDR and contrast media volume necessary to obtain diagnostic aortic intravascular attenuation (350 Hounsfield Units
Patient then underwent CT scan examination of the thorax that revealed a huge fat density (-65 to -105 Hounsfield units
) lobulated lesion with scattered areas of soft tissue density and septations in right hemithorax causing passive collapse of the underlying right middle and lower lobe with contralateral mediastinal shift.
Any renal mass that enhances with intravenous administration of contrast material on CT scanning by more than 15 hounsfield units
(HU) should be considered a renal cell carcinoma (RCC) until proved otherwise1,2.