advances in emergency imagingmassgeneralimaging.org/alumni/hampton2010/novel... · • permits...
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Hampton Symposium, October 16, October 16thth, 2010, 2010
Advances in Emergency ImagingAdvances in Emergency Imaging
Robert A. Novelline, MDRobert A. Novelline, MD
Professor of Radiology, Harvard Medical SchoolProfessor of Radiology, Harvard Medical School
Director of Emergency Radiology, Massachusetts General HospitalDirector of Emergency Radiology, Massachusetts General Hospital
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Outline:Outline:
Advances in Emergency ImagingAdvances in Emergency Imaging
1. Recognition as a radiology subspecialty
2. Explosive growth MGH ED cross-sectional imaging
3. Redesign MGH Emergency Imaging Division
4. MGH Emergency Imaging technical advances
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Subspecialty Emergency RadiologySubspecialty Emergency Radiology
Definition:
“The imaging & imaging management of acutely ill and injured patients”
Responsibilities:
Imaging of ED patients as well as off-hours imaging of all patients
One the newest radiology subspecialties
Currently 5 USA Emergency Radiology fellowship programs
Subspecialty Society: American Society of Emergency Radiology (ASER)
Founded in Boston in 1988, currently over 400 members
ASER Resident Core Curriculum in Emergency Radiology
Journal: Emergency Radiology
Refresher/Instructional Courses in Emergency Radiology at RSNA/ARRS
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Increasing Importance ofIncreasing Importance of
Emergency Imaging in the USAEmergency Imaging in the USA
• US population is just over 300 million
• 2006 survey: 119.2 million US ED visits
– Trauma-related visits: 42.4 million
– Percent of visits resulting in admission: 13%
• Volume in US ED’s increasing 2- 5% per year
• Nationally an average of one imaging exam for
every emergency department visit
• Estimated today 20-30% of ED imaging with CT
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Changes in ImagingChanges in Imaging
Expectations for ED PatientsExpectations for ED Patients
• In the past, emergency imaging was a plain film operation
– Today, CT, US and MR are routine
• In the past, complex patients were admitted and imaged later
– Today diagnostic imaging is performed while the patient is in the ED
– Results determine whether admission occurs and to which service
– Results may indicate emergency surgery
• Today emergency physicians demand on-line imaging and
on-line interpretation of ED patients at all hours
• MGH Emergency Imaging staffed 24/7 with staff radiologists
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2. Explosive Growth of MGH2. Explosive Growth of MGH
Emergency ImagingEmergency Imaging
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MGH Emergency Department volume increases 2-3% per year
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Period of increased image utilization: 1997 to 2003
Image growth greater than growth in patient visits
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Period of image usage stabilization: 2003 to 2009
Image growth parallel to growth in patient visits
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Explosive Growth of Emergency CT
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plain films CT
Utilization C-Spine Trauma Imaging 1992-2008Utilization C-Spine Trauma Imaging 1992-2008
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3. Redesign of Emergency Imaging3. Redesign of Emergency Imaging
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Architectural Program for 2003 RenovationArchitectural Program for 2003 Renovation
of MGH Emergency Imaging Divisionof MGH Emergency Imaging Division
3 Digital radiographic rooms1 dedicated chest unit
2 multipurpose room
2 Multidetector CT scanners
1 Ultrasound room
1 MR scanner
Large consultation/reading room
Stretcher and ambulatory patient waiting areas
Technologist computer work area
Reception/scheduling desk
On-site manager’s office
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CT-2
CT-1
US
RAD-1
RAD-3
RAD-2
CT
Control
Stretcher
Waiting
MR
Computer
MR Control
Reception
Amb
Waiting Conference
Consultation
Tech
Manager
Lounge
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MGH Emergency RadiologyMGH Emergency Radiology
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Reception; Patient WaitingReception; Patient Waiting
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Two MDCT Scanners with LargeTwo MDCT Scanners with Large
CT Control RoomCT Control Room
64-Slice
16-Slice
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Restricted Access MR SuiteRestricted Access MR Suite
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Consultation Room has 8 PACSConsultation Room has 8 PACS
WorstationsWorstations and a 3D Workstation and a 3D Workstation
8 PACS
NEURO
CORNER3D
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Plasma Screen PACS Monitor forPlasma Screen PACS Monitor for
Conferences and Work RoundsConferences and Work Rounds
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4. MGH Emergency Imaging4. MGH Emergency Imaging
Technical AdvancesTechnical Advances
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Emergency Imaging Research TopicsEmergency Imaging Research Topics
• Facial Trauma CT utilization
• Aortic Dissection CT Utilization
• MDCT Classification of Le Fort Facial Fractures
• PE CT; Comparison with D-dimer in 1000 ED Cases
• Comparison of Chest Film and Chest CT in Trauma; 563 cases
• Value of Cervical Spine CT Soft Tissue Windows
• Role of Coronal and Sagittal Reformations in TL Spine Trauma
• CT of Bowel Ischemia
• CT of Epiploic Appendagitis
• MR of Pregnant Patients with Suspected Appendicitis
• MR of Children with Suspected Appendicitis
• CT of Bladder Trauma; Role of Multiplanar Reformations
• CT of Soft tissue injuries of the Orbit
• Role CT Sagittal Reformations in Facial Trauma
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Innovations by MGH Innovations by MGH
Emergency ImagingEmergency Imaging
1. Developed the total body trauma scan
2. Pioneered volumetric trauma imaging
3. Volumetric estimation of pneumothorax size
4. Advances in imaging the acute abdomen• Appendicitis, diverticulitis, epiploic appendagitis
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The The ““Total BodyTotal Body”” Trauma Scan Trauma Scan
• *First described in 2001 ASER (RSNA 2002) andfirst reported by the MGH Emergency Imaging
• Made possible with advent of helical scanningand significantly improved with MDCT
• Permits rapid imaging of the head, spine, chestabdomen and pelvis in the multiple traumapatient; continued on to include
• Excellent multiplanar and volumetric reformationsfor evaluation of complex injuries
* Ptak T, Rhea J, Novelline RA, Radiation dose is reduced using a single-pass whole-body trauma protocol
as compared to a conventional segmented imaging method. Radiology, December 2003 229:902-905
*Ptak T, Rhea JT, Kihiczak D, Sacknoff R, Lawrason NJ, Novelline RA. A multidetector single pass CT
protocol for evaluation of the multiple trauma patient: challenging the multitrauma imaging paradigm.
Proceedings 12 Annual Meeting of the American Society of Emergency Radiology, March, 2001:58
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Why a total body trauma scan?Why a total body trauma scan?
• Location of fatal injuries
– 40% from head injuries
– 25% from chest injuries
– 10% from abdominal injuries
– 20% related to spine trauma
• “Total Body” MDCT scan
– Scan from vertex of head through pelvis can evaluate
for injuries in these four areas in a quick 2-4 minute
single acquisition CT scan
– Not for everyone; indicated for the polytrauma patient
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““Total BodyTotal Body”” Trauma Scan Protocols Trauma Scan Protocols
• Recommendation: 16 slice or greater MDCT scanner
• Use IV contrast material for chest, abdomen, pelvis
• Routine oral contrast not needed today
– Triple contrast (oral, colon, IV) for penetrating injuries
• If suspected carotid/vertebral injury, scan head/neck
with IV contrast after non-contrast head scan
• Continue scan as a run-off for lower extremity injury
• Delayed scan for positive parenchymal organ injury
• CT cystogram for suspected bladder rupture
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Constructed from
2055 0.625 slices
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Volumetric Trauma ImagingVolumetric Trauma Imaging
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Volumetric Trauma ImagingVolumetric Trauma Imaging
• MGH Emergency Imaging has pioneered and
promoted volumetric trauma imaging
• 3D workstation in reading room available for
24/7 volumetric, MIP, curved plane, perfusion
and other MDCT reformations
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Depressed Skull FractureDepressed Skull Fracture
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Volume RenderedVolume Rendered
Depressed Skull FractureDepressed Skull Fracture
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Displaced Zygoma Complex FractureDisplaced Zygoma Complex Fracture
Get higher image
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Volume Rendered DisplacedVolume Rendered Displaced
ZMC with Frontal FractureZMC with Frontal Fracture
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Child with Pencil Foreign Body inChild with Pencil Foreign Body in
Left OrbitLeft Orbit
VR Bone Shows Only Pencil Graphite Center
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VR Soft Shows Entire PencilVR Soft Shows Entire Pencil
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Whiplash Injury in MVCWhiplash Injury in MVC
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Sagittal ReformationsSagittal Reformations
Right Left
4
5
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Capsular Ligament Disruption on 3DCapsular Ligament Disruption on 3D
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Aortic InjuryAortic Injury
Multiple TraumaMultiple Trauma
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Volumetric Images Aortic TraumaVolumetric Images Aortic Trauma
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Subclavian ArterySubclavian Artery
Traumatic OcclusionTraumatic Occlusion
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Pelvic Fractures in MVCPelvic Fractures in MVC
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Volumetric ReformationsVolumetric Reformations
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Measuring Pneumothorax SizeMeasuring Pneumothorax Size
How Big are They?How Big are They?
Right PNX is 496cc; Left PNX is 53.5cc
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Advances in Imaging theAdvances in Imaging the
Acute AbdomenAcute Abdomen
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Appendiceal ImagingAppendiceal Imaging
• Developed an MDCT appendiceal
imaging protocol utilizing IV &
rectal contrast associated with 99%
accuracy
• Reported that the routine use of
appendiceal CT would decrease
unnecessary surgery and cut
health care costs
*Rao PM, Rhea JT, Novelline RA, Mostafavi AA, McCabe CJ. Effect of
computed tomography of the appendix on treatment of patients and use of
hospital resources. NEJM. 1998;338(3):141-146
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Promoted the Use of MR for SuspectedPromoted the Use of MR for Suspected
Appendicitis in Pregnant PatientsAppendicitis in Pregnant Patients
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Investigated MDCT of DiverticulitisInvestigated MDCT of Diverticulitis
Frequency of findings of diverticulitis*
– Paracolonic fat stranding 100%
– Diverticula 97%
• With or without fecalith
– Focal colon wall thickening 94%
• Greater than 5mm
– Muscular hypertrophy 90%
– Free air 21%
– Abscess/phlegmon 21%
– Free fluid 8%
*Kircher MF, Rhea JT, Kihiczak D, Novelline RA.
Frequency, Sensitivity, and Specificity of Individual
Signs of Diverticulitis on Thin-Section Helical CT. AJR
2002; 178:1313-1318
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Described the CT Appearance ofDescribed the CT Appearance of
Epiploic AppendagitisEpiploic Appendagitis
Paracolic 1-4 cm oval fat
density surrounded by
inflammatory fat stranding
Inflammation is para-colonic
rather than peri-colonic
May be slightly denser than
normal fat and have a
central blood vessel density
May show adjacent bowel wall
thickening
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Described the Evolution ofDescribed the Evolution of
Epiploic AppendagitisEpiploic Appendagitis
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SummarySummary
• Emergency Imaging has grown in volume
and sophistication with increased emphasis
on cross-sectional imaging
• Expectations are for high quality imaging and
on-line interpretation 24/7
• Current standards of care require optimal
technologies for emergency imaging
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Thank You for Your Attention!Thank You for Your Attention!
Robert A. Novelline, MD
Professor of Radiology, Harvard Medical School
Director of Emergency Radiology, Massachusetts General Hospital