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5 protocols using ge optima

1

Paraspinal Muscle Attenuation in Older Adults

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Paraspinal CT measurements for each older adult undergoing treatment were obtained from their medical records from routine non-contrast CT of the chest. We used axial images localized to the twelfth thoracic vertebrae (T12) in CT image analyses in Osirix MD (Pixmeo, Bernex, Switzerland). We placed 2 cm2 ovoid ROIs in the erector spinae muscles bilaterally and the Hounsfield units (HU) were averaged to obtain erector spinae HU (see Figure 1). If the available erector spinae areas were <2 cm2, the largest available region of interest was used. Eight CT scans were non-contrast, and two had early arterial phase contrast. CT scanners used were GE Revolution HD (n = 4), GE Revolution EVO (n = 3), and GE Optima (n = 3) (GE Healthcare, Madison, WI) and all but 1 scan was conducted at the University of Wisconsin Health Hospital in Madison, WI.
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2

Auditory Brainstem Response Evaluation in cCMV

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The ABR was recorded from 70 dB nHL down to threshold or 20 dB nHL minimum, and up to a maximum of 80 dB nHL for the NE, and 90 dB nHL for the IE (100 µs rarefaction clicks, repetition rate 39 Hz, insert earphones, Eclipse EP25 (program version 4.3.0.17, Interacoustics, Middelfart, Denmark)) [20 (link),25 (link)]. For a full description of measurements and results see [20 (link)].
Tests of the cCMV infection were based on Polymerase chain reaction (PCR) analysis on the dried blood spot (DBS) cards typically taken 48 h after birth (n = 16), plasma test on the same day as birth (n = 1), or the mother’s lgG and lgM negative CMV blood test 51–88 days after birth (n = 3). For a full description of measurements and results see [20 (link)].
Fourteen subjects underwent MRI (19 eligible, 5 out of 19 subjects declined [20 (link)]). Thirteen MRI scans were performed with 3T scanners (Siemens Skyra or Siemens Prisma, Erlangen, Germany), and one with a 1.5 T scanner due to a combined spine MRI scan (GE Optima, GE Healthcare, Fairfield, CT, USA). Standard clinical protocols were used (see details in [20 (link)].
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3

Longitudinal MRI Evaluation of Patients

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The average interval between baseline imaging and infusion was four months (range 0.4 to 11.5 months). Follow-up imaging was performed on average 11.9 months (range 11 to 13 months) after infusion [23 (link)]. The MRI equipment of the baseline imaging included five 1.5 T units (GE Signa Twinspeed, General Electric Medical Systems, Milwaukee, WI, USA; Philips Achieva and Philips Intera, Philips Medical Systems, Eindhoven, The Netherlands; Siemens Avanto and Siemens Espree, Siemens Medical, Erlangen, Germany), a 0.34 T unit (Siemens Magnetom C, Siemens Medical, Erlangen, Germany) and a 0.23 T unit (Philips Panorama, Philips Medical Systems, Eindhoven, The Netherlands). The imaging sequences were sagittal T1-weighted (T1 W) turbo spin-echo (TSE) or fast spin-echo (FSE) with fluid attenuation inversion recovery (FLAIR), sagittal T2-weighted (T2 W) TSE/FSE, and short tau inversion recovery sequences (STIR). The specific imaging parameters have been described previously [23 (link)]. The MRI equipment of the one-year follow-up imaging included two 1.5 T units (GE Signa Twinspeed and GE Optima, General Electric Medical Systems, Milwaukee, WI, USA) and a 3 T unit (Siemens Skyra, Siemens Medical, Erlangen, Germany). Imaging protocols were established for clinical spine imaging.
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4

COVID-19 Chest CT Imaging Protocol

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CT scans were performed on different scanners depending on hospital equipment availability for COVID-19 patients during the emergency. The equipment used comprised a 128 slice CT-scanner (Somatom Definition Flash, Siemens, Erlangen, Germany), 64-slice CT-scanner (GE Optima, GE Medical Systems, Milwaukee, WI, USA), 16 slice CT-scanner (GE Medical Systems) and 64 slice CT-scanner (Siemens Healthcare). Patients were scanned in supine position, full inspiration, using a standard volumetric protocol for unenhanced chest CT. For the purpose of this study, CT images were reconstructed with 1.25 mm slice thickness and a spacing of 1.25 mm and evaluated using abdominal windowing (30-360 Hounsfield Unit (HU)). The standard chest CT-scan acquired in full inspiration included part of both kidneys as per protocol.
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5

Multi-Modal CT Imaging for Spinal Assessment

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CT data were acquired on six different MDCT scanners (GE Revolution and GE Optima, GE Healthcare; Somatom Definition AS+, Somatom Definition Edge, Somatom Drive, and Somatom Force, Siemens Healthineers). A peak tube voltage of 120 kVp and adaptive tube load was used for all images with the scanners in helical mode. Depending on the clinical indication, most scans were performed after application of intravenous contrast agent (Iomeron 400, Bracco) (n = 152). Arterial or portal venous phase scans were either acquired after a CT-attenuation threshold was surpassed in a region of interest (ROI) placed in the aorta (arterial) or after 70 s of delay (venous). Reconstructions for sagittal reformation of the spine were conducted with a standard bone kernel and 2 mm slice thickness. Clinical indications for CT imaging were not related to bone densitometry and included, e.g., acute and chronic back pain, suspected VF, as well as the assessment of acute thoracic and abdominal pathologies.
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