Abstract:
BACKGROUND:Recently a 320-detector-row CT (MDCT) scanner has become available that allows axial volumetric scanning of a 16-cm-long range (50 cm field of view) in a single 0.35-s rotation. For imaging neonates and small children, volume scanning is potentially of great advantage as the entire scan range can be acquired in 0.35 s, which can reduce motion artefacts and may reduce the need for sedation in clinical CT imaging. Also, because there is no over-ranging associated with axial volumetric scanning, this may reduce patient radiation dose. OBJECTIVE:To evaluate, by means of a phantom study, scan time and patient dose for thoracic imaging in neonates and small children by using axial cone-beam and helical fan-beam MDCT acquisitions. MATERIALS AND METHODS:Paediatric imaging protocols were assessed for a 320-MDCT volumetric scanner (Aquilion ONE, Toshiba, Otawara, Japan). The 320-MDCT scanner allows for cone-beam acquisitions with coverage up to 160 mm, but it also allows for helical fan-beam acquisitions in 64-, 32-, or 16-MDCT modes. The acquisition configurations that were evaluated were 320 x 0.5 mm, 240 x 0.5 mm, and 160 x 0.5 mm for axial volumetric scanning, and 64 x 0.5 mm, 32 x 0.5 mm, and 16 x 0.5 mm for helical scanning. Dose assessment was performed for clinically relevant paediatric angiographic or chest/mediastinum acquisition protocols with tube voltages of 80 or 100 kVp and tube currents between 40 and 80 mA. RESULTS:Scan time was 0.35 s for 320-MDCT acquisitions, scan times varied between 1.9 s and 8.3 s for helical acquisitions. Dose savings varying between 18% and 40% were achieved with axial volumetric scanning as compared to helical scanning (for 320- versus 64-MDCT at 160 mm and 80 kVp, and for 320- versus 16-MDCT at 80 mm and 100 kVp, respectively). Statistically significant reduction in radiation dose was found for axial 320-MDCT volumetric scanning compared to helical 64-, 32-, and 16-MDCT scanning. CONCLUSION:Axial thoracic CT of neonates and small children with volumetric 320-MDCT can be performed between 5 and 24 times faster compared to helical scanning and can save patient dose.
journal_name
Pediatr Radioljournal_title
Pediatric radiologyauthors
Kroft LJ,Roelofs JJ,Geleijns Jdoi
10.1007/s00247-009-1436-xsubject
Has Abstractpub_date
2010-03-01 00:00:00pages
294-300issue
3eissn
0301-0449issn
1432-1998journal_volume
40pub_type
杂志文章abstract:OBJECTIVE:To examine the extent to which intracranial pressure (ICP) in children after severe brain trauma can be determined by cranial CT. MATERIALS AND METHODS:Two experienced paediatric radiologists, without any knowledge of the clinical symptoms, evaluated 124 CT scans from 65 children (average age 5.4 years) who ...
journal_title:Pediatric radiology
pub_type: 杂志文章
doi:10.1007/s002470000255
更新日期:2000-07-01 00:00:00
abstract:BACKGROUND:Clotting factor replacement forms the pillar of treatment for children with hemophilia. Most children can be treated using peripheral venipuncture, but very young children and children with poor venous access might require a central venous catheter. Short-term and long-term complications of implantable venou...
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journal_title:Pediatric radiology
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doi:10.1007/BF02010826
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abstract:BACKGROUND:Various reports support the use of cervical spine (c-spine) CT over conventional radiography in screening of c-spine injury. Interest now exists in diagnostic radiation-induced morbidity. OBJECTIVE:To estimate excess relative risk for developing cancer from c-spine high-resolution CT radiation exposure. MA...
journal_title:Pediatric radiology
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doi:10.1007/s00247-007-0728-2
更新日期:2008-06-01 00:00:00
abstract::Congenital neutropenia is an uncommon entity which may be familial and has a wide spectrum of clinical expression. Three sisters with the severe form of the disease, that suffered from recurrent infections which lead to their demise, are described. Review of their radiographs revealed the presence of cortical thickeni...
journal_title:Pediatric radiology
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abstract::Basilar impression (BI) assessed by either plain lateral skull radiograph or computerized tomography (CT) sagittal reconstruction of the craniocervical junction is a common finding occurring in 25% of subjects with osteogenesis imperfecta (OI). It appears to occur with highest frequency in a group of subjects with OI ...
journal_title:Pediatric radiology
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abstract:BACKGROUND:Air enema under fluoroscopy is a well-accepted procedure for the treatment of childhood intussusception. However, the reported radiation doses of pneumatic reduction with conventional fluoroscopy units have been high in decades past. OBJECTIVE:To compare current radiation doses at our institution to past do...
journal_title:Pediatric radiology
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doi:10.1007/s00247-014-3218-3
更新日期:2015-04-01 00:00:00
abstract::Langerhans cell histiocytosis of the head and neck is an uncommon histiocytic proliferative disorder that often clinically resembles an inflammatory process. A pseudoaneurysm of the external carotid artery was found by contrast-enhanced CT and confirmed by Doppler ultrasonography and angiography in a 9 year old girl w...
journal_title:Pediatric radiology
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doi:10.1007/BF02020220
更新日期:1993-01-01 00:00:00
abstract::Ectopic thyroid gland is a well-known developmental anomaly. We present a child with a unique anatomical variant of this anomaly, namely double ectopic thyroid. The purpose of this report is to demonstrate the scintigraphic findings and to emphasize the importance of performing a thyroid scan in every case of thyroid ...
journal_title:Pediatric radiology
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journal_title:Pediatric radiology
pub_type: 杂志文章,评审
doi:10.1007/s00247-009-1519-8
更新日期:2010-07-01 00:00:00
abstract::Imaging plays a major role in the diagnostic work-up of children with hepatobiliary or pancreatic diseases. It consists mainly of US, CT and MRI, with US and MRI being the preferred imaging modalities because of the lack of ionizing radiation. In this review the technique of US, CT and MRI in children will be addresse...
journal_title:Pediatric radiology
pub_type: 杂志文章,评审
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更新日期:2011-01-01 00:00:00
abstract::A patient with tuberous sclerosis and a normal intravenous urogram 5 years previously presented with a large and palpable upper pole renal mass. Since patients with tuberous sclerosis have small bilateral hamartomas, a Wilms' tumor was suspected. In retrospect, inhomogenous nephrograms should have alerted the radiolog...
journal_title:Pediatric radiology
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doi:10.1007/BF01092953
更新日期:1980-07-01 00:00:00
abstract::Epithelioid haemangioendothelioma has not been previously described in a patient with congenital hemihypertrophy and diabetes mellitus. Hepatic nodules were incidentally discovered on a routine US examination searching for known associated abnormalities. Pulmonary nodules were present on chest X-ray and CT of the lung...
journal_title:Pediatric radiology
pub_type: 杂志文章
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更新日期:1999-08-01 00:00:00
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更新日期:2015-09-01 00:00:00
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doi:10.1007/s00247-020-04885-w
更新日期:2020-12-11 00:00:00
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journal_title:Pediatric radiology
pub_type: 杂志文章,评审
doi:10.1007/s00247-012-2532-x
更新日期:2013-01-01 00:00:00
abstract:OBJECTIVES:Questionnaires (984) were submitted to pediatric radiologists to determine how often odontoid fractures were missed on lateral views and detected on open-mouth odontoid views in children under 5 years. Other questions relating to imaging protocols of the odontoid also were included, and there were 432 respon...
journal_title:Pediatric radiology
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doi:10.1007/s002470050043
更新日期:2000-03-01 00:00:00
abstract::Four children with Type I hepatorenal glycogen storage have been studied by barium enema. All showed strikingly similar changes of a smooth-walled, slightly narrow but normal length colon without any haustration. The findings simulated colitis but the patients had either mild diarrhea or no gastrointestinal complaints...
journal_title:Pediatric radiology
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doi:10.1007/BF01000116
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journal_title:Pediatric radiology
pub_type: 杂志文章,评审
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更新日期:2011-07-01 00:00:00
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更新日期:2003-03-01 00:00:00
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journal_title:Pediatric radiology
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doi:10.1007/s002470050089
更新日期:1997-02-01 00:00:00
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journal_title:Pediatric radiology
pub_type: 杂志文章
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更新日期:2014-12-01 00:00:00
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pub_type: 杂志文章
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更新日期:2009-06-01 00:00:00
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journal_title:Pediatric radiology
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更新日期:1997-05-01 00:00:00
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journal_title:Pediatric radiology
pub_type: 杂志文章
doi:10.1007/BF02015444
更新日期:1994-01-01 00:00:00
abstract::Aspergillus is the most common fungal infectious pathogen in immunocompromised individuals, but the diagnosis is hard to obtain. In a patient with spinal cord involvement, MRI proved to be excellent. ...
journal_title:Pediatric radiology
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doi:10.1007/BF02013175
更新日期:1990-01-01 00:00:00
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journal_title:Pediatric radiology
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更新日期:1998-05-01 00:00:00
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journal_title:Pediatric radiology
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doi:10.1007/BF00973535
更新日期:1977-09-01 00:00:00
abstract::Children with malignancies undergo recurrent imaging as part of tumor diagnosis, staging and therapy response assessment. Simultaneous positron emission tomography (PET) and magnetic resonance (MR) allows for decreased radiation exposure and acts as a one-stop shop for disease in which MR imaging is required. Neverthe...
journal_title:Pediatric radiology
pub_type: 杂志文章,评审
doi:10.1007/s00247-019-04578-z
更新日期:2020-05-01 00:00:00