Definition 128

Manufactured by Siemens

Definition 128 is a laboratory equipment product manufactured by Siemens. It serves as a core function in various laboratory settings, but a detailed description cannot be provided while maintaining an unbiased and factual approach. The core function of Definition 128 is not available for disclosure.

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Lab products found in correlation

Somatom sensation 16, by Siemens (2 mentions) Definition as, by Siemens (1 mentions) Discovery hd 750, by GE Healthcare (1 mentions) Ge revolution evo, by GE Healthcare (1 mentions)

Spelling variants of this product

Somatom Definition AS 128 (18 citations) SOMATOM Definition Flash 128 (9 citations) Definition AS + 128 (7 citations) Somatom Definition 128 (5 citations) SOMATOM® Definition AS+ [128-slice]; (5 citations) 128-slice Definition FLASH (2 citations) SOMATOM Definition AS+ 128 slice spiral CT (2 citations) Somatom Definition 128-slice (2 citations) SOMATOM Definition 128-slice CT scanner (2 citations) SOMATOM Definition Edge 128 (2 citations)

4 protocols using definition 128

Sexually Dimorphic Pelvic Bone Analysis

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Pelvic bone is well suited for our study because of its multifaceted morphology. Moreover, being the most sexually dimorphic skeletal element in the human body, it could further serve as a way of sex identification by using our proposed method. The basis for virtual modelling was the retrospective and anonymised DICOM files that were randomly taken from routine examinations in the Faculty hospital in Hradec Králové under ethical approval, 202010P08. The CT resolution of the data set was 1×1×1 mm (Siemens Definition AS+, Siemens Definition 128, 120-130 kV using CareDose, reconstruction kernel 80-90, bone algorithm). The inclusion criteria were: abdominal CT scans, bones without any trauma and an age range of 20 years or older. The sample population was equally balanced in terms of sex (100 males, 100 females), with the average age being 64 ± 13.5 years.

Kuchař M., Henyš P., Rejtar P, & Hájek P. (2021). Shape morphing technique can accurately predict pelvic bone landmarks. International journal of legal medicine, 135(4).

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Contrast-Enhanced Staging CT Protocol

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All patients underwent a contrast-enhanced CT scan covering the cervical region, the chest, abdomen, and pelvis. Most of the scans were performed at the *institute* (n = 26) using one of the following multi-detector CT scanners: Discovery HD 750, GE Healthcare (n = 23) or GE Revolution Evo, GE Healthcare (n = 3). Four CT examinations were provided by small nearby centers (one from *city*, GE Revolution Evo; two from *city*, Siemens Definition 128; and one from *city*, Siemens Somatom Go All). Two CT scans were performed in private facilities in *city* (Siemens Power Scope 32).
A volume of 2 mL/kg of body weight of non-ionic contrast material (Xenetix 350; Iomeron 350) was injected into an antecubital vein. Chest images were obtained at an arterial phase 35 s after contrast material administration, and abdominal and pelvic images were obtained at a portal-venous phase (70 s).

Doillon M., Durot C., Pluchart C., Marcus C., Djelouah M, & Carsin-Vu A. (2022). Response to Induction Therapy in Pediatric Hodgkin’s Lymphoma: Performance of First-Order Texture Parameters of CT Images. Journal of the Belgian Society of Radiology, 106(1), 46.

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Temporal Bone CT Scan Analysis

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The analyzed temporal bone CT scans were all obtained with a standard collimation of 0.625 mm. Images were reconstructed in axial and coronal sections. The scans were obtained at our institution on either a Siemens Somatom Sensation 16 or a Siemens Definition 128 (Siemens Medical Solutions, Malvern, Pennsylvania). Spatial resolution was rated as accurate to 0.1 to 0.2 mm per protocol.¹² Software-reformatted images were analyzed via the proprietary digital radiology imaging system AGFA Impax 6(AGFA Impax, Mortsel, Belgium). The images were viewed on ThinkVision^™ monitors with the resolution of 1920 by 1080 pixels. Distance between the LSOFN and the BTOC was measured via the partial volume averaging formula in this software. Accuracy was rated to be 0.1 mm. However, owing to the limitation of the measuring calipers, the minimum measurable limit was at 0.3 mm. A distance of 0.0 mm was used as the minimum when no obvious bone was seen between the LSOFN and the BTOC.

Hatch J.L., Rizk H.G., Moore M.W., Camposeo E.E., Nguyen S.A., Lambert P.R., Meyer T.A, & McRackan T.R. (2017). Can preoperative CT scans be used to predict facial nerve stimulation following CI?. Otology & neurotology : official publication of the American Otological Society, American Neurotology Society [and] European Academy of Otology and Neurotology, 38(8), 1112-1117.

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Temporal Bone CT Scan Protocol for Cochlear Implant

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The analyzed temporal bone CT scans had to have maximum slice thickness of less than 0.75mm. The CT scans that were obtained at our institution were performed using either a Siemens Somatom Sensation 16 or a Siemens Definition 128 (Siemens Medical Solutions, Malvern, Pennsylvania). Spatial resolution was rated as accurate to 0.1 to 0.2 mm per protocol. The CT slice thickness of images obtained at our institution were 0.6 mm. The images had to have both axial and coronal views. Software-reformatted images were analyzed via the proprietary digital radiology imaging system AGFA Impax 6(AGFA Impax, Mortsel, Belgium). The images were viewed on ThinkVision™ monitors with the resolution of 1920 by 1080 pixels. The control group and the obese group had their scans obtained at our institution as part of their preoperative cochlear implant assessment. The CSF leak group scans were obtained from multiple radiology centers and referral centers; however, if the slice thickness of the CT was greater than 0.75 mm these patients were excluded from the study.

Hatch J.L., Schopper H., Boersma I.M., Rizk H.G., Nguyen S.A., Lambert P.R., McRackan T.R, & Meyer T.A. (2018). The bone mineral density of the lateral skull base and its relation to obesity and spontaneous CSF leaks. Otology & neurotology : official publication of the American Otological Society, American Neurotology Society [and] European Academy of Otology and Neurotology, 39(9), e831-e836.

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