Radiologic Clinics Of North America Advances in Gastrointestinal Imaging

Cover......Page 1
Preface......Page 2
Impact of Obesity on Radiology......Page 4
Prevalence of obesity......Page 5
Scheduling/transportation/throughput......Page 6
Fat attenuation......Page 7
Specific solutions......Page 8
Table weight......Page 9
Artifacts......Page 10
Bore diameter and bore length......Page 12
Artifacts......Page 13
Table weight and aperture diameter......Page 14
Mammography......Page 15
Radioisotope factors......Page 16
Patient sedation......Page 17
References......Page 18
Roux-en-Y gastric bypass procedure......Page 20
Technique and expected imaging findings after Roux-en-Y gastric bypass procedure: upper gastrointestinal examination and CT......Page 21
Postoperative leak......Page 23
Potential pitfalls that may mimic extraluminal leak on upper gastrointestinal examination......Page 24
Gastric staple-line dehiscence or disruption......Page 25
Marginal ulcers......Page 27
Late small bowel obstruction......Page 28
Internal hernia......Page 29
Patterns of small bowel obstruction after Roux-en-Y gastric bypass procedure......Page 30
Summary......Page 31
References......Page 32
Adjustable Laparoscopic Gastric Banding for Morbid Obesity: Imaging Assessment and Complications......Page 34
Laparoscopic adjustable gastric banding: overview......Page 35
Radiologic evaluation for laparoscopic adjustable gastric banding......Page 36
Fluoroscopic band adjustment......Page 37
Complications after laparoscopic adjustable gastric banding......Page 38
Pouch dilatation......Page 39
Concentric pouch dilatation with a narrow stoma......Page 40
Band slippage......Page 41
Intragastric migration of the band......Page 42
Problems with the port, connecting tubing, and band......Page 43
References......Page 45
Oral contrast medium......Page 48
3D imaging and image review......Page 49
Vascular anatomy......Page 50
Bowel dilatation......Page 52
Bowel wall attenuation......Page 53
Vasculitis.......Page 54
Chronic mesenteric ischemia......Page 55
Diagnosis......Page 57
Summary......Page 59
References......Page 60
CT Enteroclysis: Techniques and Applications......Page 62
CT enteroclysis with neutral enteral and intravenous contrast......Page 63
CT enteroclysis with positive enteral contrast......Page 65
CT parameters......Page 66
Clinical indications......Page 67
Miscellaneous applications......Page 68
Precapsule endoscopy......Page 69
Postcapsule endoscopy......Page 70
Summary......Page 72
References......Page 73
Patient preparation......Page 75
Multiphasic imaging technique......Page 76
Enteric findings......Page 77
Extraenteric findings......Page 79
Differentiating underdistended normal bowel from diseased bowel......Page 80
Performance of CT enterography in the evaluation of Crohn’s disease......Page 81
Obscure gastrointestinal bleeding......Page 82
Imaging findings......Page 83
Performance of CT enterography in the evaluation of obscure gastrointestinal bleeding......Page 84
Summary......Page 85
References......Page 86
Advantages......Page 88
Limitations......Page 89
Enteroclysis versus enterography......Page 90
Positive contrast agents......Page 91
Pulse sequences......Page 92
Assessment of Crohn’s disease......Page 94
Small bowel obstruction......Page 98
Small bowel neoplasms......Page 99
References......Page 100
Colonic cleansing......Page 103
Polyethylene glycol electrolyte lavage solution......Page 104
Glucagon......Page 105
Hyoscine butylbromide......Page 106
Carbon dioxide......Page 107
Stool and fluid tagging......Page 109
Techniques and protocols......Page 110
Accuracy......Page 112
References......Page 113
Acknowledgments......Page 116
Two-dimensional visualization and interpretation......Page 117
Three-dimensional endoluminal visualization and interpretation......Page 118
Bells and whistles......Page 119
Novel views......Page 121
Filet view......Page 123
Unfolded cube view......Page 124
Common pitfalls in virtual colonoscopy......Page 125
Appendix 1......Page 127
References......Page 128
Third-party coverage......Page 129
Clinical colleagues......Page 130
Colonic preparation......Page 131
Colonic distention......Page 133
Multidetector protocol......Page 134
Biphasic polyp detection......Page 136
Diagnostic algorithm......Page 137
Diagnostic pitfalls......Page 140
Summary......Page 141
References......Page 142
MR Colonography......Page 144
Techniques of MR colonography......Page 145
Detection of colorectal masses......Page 147
Inflammatory bowel disease......Page 150
Acceptance of MR colonography......Page 151
References......Page 152