Scopo del nostro lavoro è stato quello di ottimizzare le sequenze di angiografia a risonanza magnetica più adatte a una bobina dedicata per lo studio dei vasi epiaortici di recente introduzione nella pratica clinica.
Tale bobina consente di visualizzare l'intero asse carotideo e vertebrale con un'unica acquisizione coronale o sagittale.
La tecnica angiografica da noi utilizzata è stata la 3D time of flight (TOF) e abbiamo ottimizzato i parametri tecnici su 15 volontari sani. La sequenza da noi sperimentata consente di acquisire le immagini dei vasi epiaortici (dall'origine al tratto intra-cranico) in un tempo di circa 13′.
Lo studio di pazienti portatori di patologia è ancora alle fasi iniziali, ma i primi risultati sembrano promettenti.
Tale bobina consente di visualizzare l'origine e il tratto intra-cranico dei vasi epiaortici e potrebbe quindi favorire una maggiore diffusione dell'esame angio-RM delle arterie carotidi e vertebrali.
AlfidiRJMasarykTJ: MR angiography of peripheral, carotid, and coronary arteries. Am J Radiol149: 1097–109, 1987.
2.
AndersonCMEdelmanRRTurskiPA: Clinical magnetic resonance angiography. Raven Press, New York1993: 309–40.
3.
AndersonCMSalonerD: Dedicated coil for carotid MR angiography. Radiology176: 868–72, 1990.
4.
AndersonCMSalonerD: Assessment of carotid artery stenosis by MR angiography: Comparison with X-ray angiography and color-coded doppler ultrasound. Am J Neuroradiol13: 989–1003, 1992.
5.
ArchieJP: Carotid endoarterectomy when the distal internal carotid artery is small or poorly visualized. J Vasc Surg19: 23–31, 1994.
6.
BermanSSBernhardVM: Critical carotid artery stenosis: Diagnosis, timing of surgery, and outcome. J Vasc Surg20: 499–510, 1994.
7.
BlasbergDJ: Duplex sonography for carotid artery disease: An accurate technique. Am J Neuroradiol3: 609–14, 1992.
8.
BlatterDDBahrAL: Cervical carotid MR angiography with multiple overlapping thin-slab acquisition: Comparison with conventional angiography. Am J Radiol161: 1269–77, 1993.
9.
BongartzGMVestringT: Effect of slice orientation in 3D magnetic resonance angiography (MRA) of supraaortic arteries. Eur J Radiol1: 158–64, 1991.
10.
BoykoOBEdelmanRRLittAW: MR angiography of the carotid arteries: Clinical applications, RSNA Today Video, vol 5, n 1: 1991.
11.
BradacGB. Angiography in cerebral ischemia. Rivista di Neuroradiol3 (suppl 2): 57–66, 1990.
12.
Brant-ZawadzkiM: Routine MR imaging of the internal carotid artery siphon: Angiographic correlation with cervical carotid lesions. Am J Neuroradiol11: 467–71, 1990.
13.
BrownDGRiedererSJ: Contrast-to-noise ratios in maximum intensity projection images. Magn Reson Med23: 130–7, 1992.
BuiLNBrant-ZawadzkiM: Magnetic resonance angiography of cervicocranial dissection. Stroke24: 126–31, 1993.
16.
BuijsPCKlopRB: Carotid bifurcation imaging: Magnetic resonance angiography compared to conventional angiography and doppler ultrasound. Eur J Vasc Surg7: 245–51, 1993.
17.
CarrieroAUcchinoS: Carotid bifurcation stenosis: A comparative study between MR angiography and duplex scanning with respect to digital subtraction angiography. J Neuroradiol22: 103–11, 1995.
18.
CastilloM: Diagnosis of disease of the common carotid artery bifurcation: CT angiography vs catheter angiography. Am J Radiol161: 395–8, 1993.
19.
ChongBWKerberCW: Blood flow dynamics in the vertebrobasilar system: Correlation of a transparent elastic model and MR angiography. Am J Neuroradiol15: 733–45, 1994.
20.
CrosbyDLTurskiPADavisWL: Magnetic resonance angiography and stroke: Techniques, applications and limitations. Neuroimaging Clin North Am2: 509–31, 1992.
21.
CummingMJMorrowIM: Carotid artery stenosis: A prospective comparison of CT angiography and conventional angiography. Am J Radiol163: 517–23, 1994.
22.
DavisPHHachinskiV: Epidemiology of cerebrovascular disease. In: AndersonDW, (ed): Neuroepidemiology: A tribute to Bruce Schoenberg. CRC Press. Boca Raton1991: 27–53.
23.
De MarcoJKNesbitGM: Prospective evaluation of extracranial carotid stenosis: MR angiography with maximum-intensity projections and multiplanar reformation compared with conventional angiography. Am J Radiol163: 1205–12, 1994.
24.
DillonEHvan LeeuwenMS: CT angiography: Application to the evaluation of carotid artery stenosis. Radiology189: 211–9, 1993.
25.
DingXTkachJA: Sequential three-dimensional time-of-flight MR angiography of the carotid arteries: Value of variable excitation and postprocessing in reducing venetian blind artifact. Am J Radiol163: 683–8, 1994.
26.
DumolinCLHartHR: Magnetic resonance angiography. Radiology161: 717–20, 1986.
EvansAJRichardsonDB: Poststenotic signal loss in MR angiography: Effects of echo time, flow compensation, and fractional echo. Am J Neuroradiol14: 721–9, 1993.
29.
FarmiloRScottD: Role of duplex scanning in the selection of patients for carotid endoarterectomy. Br J Surg77: 388–90, 1990.
30.
FuruyaYIsodaH: Magnetic resonance angiography of extracranial carotid and vertebral arteries, including their origins: Comparison with digital subtraction angiography. Neuroradiology35: 42–5, 1992.
31.
GaseckiAPFergusonGG: Early endoarterectomy for severe carotid artery stenosis after a non disabling stroke: Results from the North American Symptomatic Carotid Endoarterectomy Trial. J Vasc Surg20: 288–95, 1994.
32.
GoldbergHIGrossmanRI: Cervical internal carotid artery dissecting hemorrhage: Diagnosis using MR. Radiology158: 157–61, 1986.
33.
HankeyGJWarlowCPMolyneuxAJ: Complications of cerebral angiography for patients with mild carotid territory ischaemia being considered for carotid endoarterectomy. J Neurol Neurosurg Psychiatry53: 542–8, 1990.
34.
HeisermanJEDeanBL: Neurologic complications of cerebral angiography. Am J Neuroradiol15: 1401–7, 1994.
HustonJLewisBD: Carotid artery: Prospective blinded comparison of two-dimensional time-of-fligth MR angiography with conventional angiography and duplex US. Radiology186: 339–44, 1993.
37.
JamesCAGlasierCMAngtuacoEE: Altered vertebrobasilar flow in children: Angiographic, MR, and MR angiographic findings. Am J Neuroradiol16: 1689–95, 1995.
38.
KellerPJDrayerBP: MR angiography with two-dimensional acquisition and three-dimensional display. Work in progress. Radiology173: 527–32, 1989.
39.
KidoDKBarsottiJB: Evaluation of the carotid artery bifurcation: Comparison of magnetic resonance angiography and digital subtraction arch aortography. Neuroradiology33: 48–51, 1991.
40.
KidoDKMoranCJ: When should third-party payers provide reimbursement for MR angiography of the carotid arteries?Am J Radiol162: 19–20, 1994.
41.
KidoDKPanzerRJ: Clinical evaluation of stenosis of the carotid bifurcation with magnetic resonance angiographic techniques. Arch Neurol48: 484–9, 1991.
42.
LasterREAckerJD: Assessment of MR angiography versus arteriography for evaluation of cervical carotid bifurcation disease. Am J Neuroradiol14: 681–8, 1993.
43.
LevineRLTurskiPA: Comparison of magnetic resonance volume flow rates, angiography and carotid dopplers. Preliminary results. Stroke25: 413–7, 1994.
44.
LèvyCLaissyJP: Carotid and vertebral artery dissections: Three-dimensional time-of-flight MR angiography and MR imaging versus conventional angiography. Radiology190: 97–103, 1994.
45.
LiWKramerJ: MR angiography of the extracranial carotid arteries using a two-slab oblique 3-D acquisition. Am J Neuroradiol13: 1423–28, 1992.
46.
LittAWEidelmanEM: Diagnosis of carotid artery stenosis: Comparison of 2DFT time-of-flight MR angiography with contrast angiography in 50 patients. Am J Neuroradiol12: 149–54, 1991.
47.
LuscherTStansonA: Arterial fibromuscolar dysplasia. Mayo Clin Proc62: 931, 1987.
48.
MarksMPNapelS: Diagnosis of carotid artery disease: Preliminary experience with maximum-intensity-projection spiral CT angiography. Am J Radiol160: 1267–71, 1993.
49.
MasarykAMRossJS: 3DFT MR angiography of the carotid bifurcation: Potential and limitations as a screening examination. Radiology179: 797–804, 1991.
MascalchiMFondaC: Sequenze Spin-Echo e Gradient-Recalled-Echo a confronto nello studio RM della dissecazione della carotide interna. Rivista di Neuroradiologia4 (3): 323–30, 1991.
52.
MattleHPKentKC: Evaluation of the extracranial carotid arteries: Correlation of magnetic resonance angiography, duplex ultrasonography, and conventional angiography. J Vasc Surg13: 838–45, 1991.
53.
MittlRLBroderickM: Blinded-reader comparison of magnetic resonance angiography and duplex ultrasonography for carotid artery bifurcation stenosis. Stroke25: 4–10, 1994.
MooreW: Does tandem lesion mean tandem risk in patients with carotid artery disease?J Vasc Surg7: 454, 1988.
56.
NägeleTKloseU: MR-angiographie der halsgefäße mit optimierter linear ansteigender pulswinkelverteilung. Röfo161 (5): 399–403, 1994.
57.
OsbornAG: Diagnostic neuroradiology. Mosby, St. Louis1994, 332–41.
58.
PanXMAndersonCM: Magnetic resonance angiography of the carotid artery combining two- and three-dimensional acquisitions. J Vasc Surg16: 609–18, 1992.
59.
PanXMSalonerD: Assessment of carotid artery stenosis by ultrasonography, conventional angiography, and magnetic resonance angiography: Correlation with ex vivo measurement of plaque stenosis. J Vasc Surg21: 82–9, 1995.
60.
PatelMRKlufasRA: MR angiography of the carotid bifurcation: Artifacts and limitations. Am J Radiol162: 1431–7, 1994.
61.
PatelMRKuntzKM: Preoperative assessment of the carotid bifurcation. Can magnetic resonance angiography and duplex ultrasonography replace contrast arteriography?Stroke26: 1753–8, 1995.
PolakJFBajakianRL: Detection of internal carotid artery stenosis: Comparison of MR angiography, color doppler sonography, and arteriography. Radiology182: 35–40, 1992.
66.
PolakJFKalinaP: Carotid endoarterectomy: Preoperative evaluation of candidates with combined doppler sonography and MR angiography. Work in progress. Radiology186: 333–338, 1993.
67.
RicottaJJBryanFA: Multicentre validation study of real-time (B-mode) ultrasound, arteriography, and pathological examination. J Vasc Surg6: 512–20, 1987.
68.
RilesTEidelmanE: Comparison of magnetic resonance angiography, conventional angiography and duplex scanning. Stroke23: 341–6, 1992.
69.
RoedererG: Is siphon disease important in predicting outcome in endoarterectomy disease?Arch Surg118: 1177, 1983.
70.
RotherJWentzKU: Magnetic resonance angiography in vertebrobasilar ischemia. Stroke24: 1310–5, 1993.
71.
RubinsteinD: MR imaging and the evaluation of extracranial carotid stenosis. Am J Radiol163: 1213–4, 1994.
72.
SchulerJFlaniganD: The effect of carotid siphon stenosis on stroke rate, death, and relief of symptoms following elective carotid endoarterectomy. Surgery92: 1058, 1982.
73.
SchwartzRBJonesKM: Common carotid artery bifurcation: Evaluation with spiral CT. Work in progress. Radiology185: 513–9, 1992.
SueDEBrant-ZawadzkiMNChanceJ: Dissection of cranial arteries in the neck: Correlation of MRI and arteriography. Neuroradiology34: 273–8, 1992.
76.
TkachJARuggieriPM: Three-dimensional time-of-flight MR angiography with a specialized gradient head coil. J Magn Reson Imaging3 (2): 365–75, 1993.
77.
TkachJARuggieriPM: Pulse sequence strategies for vascular contrast in time-of-flight carotid MR angiography. J Magn Reson Imaging3 (6): 811–20, 1993.
78.
TurnipseedWDKennellTW: Combined use of duplex imaging and magnetic resonance angiography for evaluation of patients with symptomatic ipsilateral high grade carotid stenosis. J Vasc Surg17: 832–40, 1993.
79.
VanninenRLManninenHI: Carotid artery stenosis: Clinical effiocacy of MR phase-contrast flow quantification as an adjunct to MR angiography. Radiology194: 459–67, 1995.
80.
WagleWADumoulinCL: 3DFT MR angiography of carotid and basilar arteries. Am J Neuroradiol10: 911–9, 1989.
81.
WarlowC: MRF European carotid surgery trial: Interim results for symptomatic patients with severe (70–99 %) or with mild (0–29 %) carotid stenosis. Lancet337: 1235–43, 1991.
82.
YoungGRHumphreyPRD: Comparison of magnetic resonance angiography, duplex ultrasound and digital subtraction angiography in assessment of extracranial internal carotid artery stenosis. J Neurol Neurosurg Psychiatry57: 1466–78, 1994.
83.
ZuberMMearyE: Magnetic resonance imaging and CT scan in cervical artery dissections. Stroke25: 576–81, 1994.
