CT scans were performed on a 64-channel multislice (Brilliance 40 scanner, Philips Medical Systems, Cleveland, OH, United States; and General Electrics Lightspeed VCT, Chicago Illinois, United States), a 128-channel multislice dual-source CT system (Somatom Definition Flash, Siemens, Forchheim, Germany), or a 16-channel multislice (Emotion 16 CT, Siemens, Erlangen, Germany). The acquisitions were gathered with patients in the supine position at end-inspiratory holds, with 120 kV and 120–300 mA, slice thickness ranging from 1 to 2 mm with 50% superposition, and 512 × 512, 768 × 768, or 1,024 × 1,024 voxels matrix. Reconstruction algorithms were C(1), FC13(5), FC86(1), L(79), B50f(35), B60f(1), B70s(12), I50f/2(1), LUNG(51), SOFT(3), depending on the CT manufacture.
Brilliance 40 scanner
Manufactured by Philips
Sourced in United States, Netherlands
The Brilliance 40 scanner is a high-performance computed tomography (CT) system manufactured by Philips. It is designed to acquire detailed, high-resolution images of the human body. The scanner features a 40-slice configuration, allowing for rapid and efficient data acquisition. The Brilliance 40 is intended for use in various medical imaging applications, providing healthcare professionals with the necessary tools to support accurate diagnoses and treatment planning.
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6 protocols using brilliance 40 scanner
1
CT Imaging Protocol for Multislice Scanners
2
CT Imaging Acquisition and Reconstruction
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CT scans were performed on a 64-channel multislice (Brilliance 40 scanner, Philips Medical Systems, Cleveland, OH, USA, and General Electrics Lightspeed VCT, Chicago, IL, USA), a 128-channel multislice dual-source CT system (Somatom Definition Flash, Siemens, Forchheim, Germany), or a 16-channel multislice (Emotion 16 CT, Siemens, Erlangen, Germany). The acquisitions were gathered with the patients in supine position with 120 kV and 120–300 mA, slice thickness ranging from 1 to 2 mm with 50% superposition, and 512 × 512, 768 × 768, or 1,024 × 1,024 voxels matrix.
Reconstruction algorithms were B50f (49 subjects), B60f (1), B70s (17), C (1), FC13 (5), FC86 (2), I50f2 (1), L (80), LUNG (69), and SOFT (4), depending on the CT manufacture.
Reconstruction algorithms were B50f (49 subjects), B60f (1), B70s (17), C (1), FC13 (5), FC86 (2), I50f2 (1), L (80), LUNG (69), and SOFT (4), depending on the CT manufacture.
3
Lung Tumor Segmentation on CT Scans
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Thin-section CT scans of the lungs were obtained at full inspiration by the SOMATOM Definition AS scanner (64×0.625 mm detector, 1.0 pitch; Siemens, Germany) or a Brilliance 40 scanner (40×0.625 mm detector configuration, 0.4 pitch, Philips, The Netherlands) with 120 KVp of tube energy and 200 mAS of effective dose. A medium sharp reconstruction algorithm was utilized for image reconstruction with a section thickness of 1 mm and a 0.7-mm increment. All CT scans were performed without contrast medium. The identified CT scans were downloaded from the Picture Archiving and Communication Systems (PACS) (Figure S1B ).
We used the open-source platform (3D-slicer, v4.9.0,www.slicer.org ) to achieve tumor segmentation via the “segment editor” model. Tumors were delineated on the CT images in horizontal, sagittal, and coronal planes using a semi-automatic segmentation based on “level tracing” and “smoothing”. A radiologist and a thoracic surgeon then reviewed all tumor segmentations in consensus, and any discrepancies were resolved by additional correction.
We used the open-source platform (3D-slicer, v4.9.0,
4
CT Imaging Protocol for Patient Biotyping
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CT scans were performed on a 64-channel multi-slice (Brilliance 40 scanner, Philips Medical Systems, Cleveland, OH, USA, and General Electrics Lightspeed VCT, Chicago Illinois, USA). The acquisitions were gathered in the axial plane with patients in the supine position with 120 kV and 120–300 mA (these parameters varied according to the biotype of the patient), slice thickness of 2 mm with 50% superposition. After the acquisition, all images were reconstructed with a matrix of 512 × 512/728 × 728 voxels using standard reconstruction algorithms.
5
CT Scan Protocol for Respiratory Artifact Reduction
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The preoperative CT examinations were conducted at deep inspiration to avoid the influence of respiratory artifacts. The scanned images were acquired on a Brilliance 40 scanner (Philips Medical Systems, Netherlands) and a Somatom Definition AS scanner (Siemens Medical Systems, Germany). The CT scan parameters and conditions were as follows: 120 kV, 180–220 mAs, 64 × 0.625 mm or 40 × 0.625 mm detector, 0.4 or 1.0 pitch, 512 × 512 matrix, reconstructed at 1.0 mm thickness with 0.7 mm increment, and a standard soft tissue kernel.
6
CT Imaging Protocol for Chest Scans
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The chest images of the current study were acquired using one of the two CT scanners: (a) the Brilliance 40 scanner (Philips, Netherlands) with a protocol of 120 kVp tube energy and 200 mAs tube current; the parameters were 40 × 0.625 mm detector, 512 × 512 matrix, and 0.4 pitch; (b) the Somatom Definition AS scanner (Siemen, Germany) with a protocol of 120 kVp tube voltage and 130 mAs effective dose. The machine parameters were 64 × 0.625 mm detector, 1.0 pitch, and 512 × 512 matrix. The 1.0-mm thickness and 0.7-mm increment were used as reconstruction standards and applied to all CT images.
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