title: Rapid prototyping of three-dimensional biomodels as an adjuvant in the surgical planning for intracranial aneurysms.
abstract: OBJECTIVE
  To fabricate a three-dimensional biomodels of intracranial aneurysms, using rapid prototyping technology, to facilitate optimal anatomical visualization of aneurysms prior to and during surgery.
  
  
  METHODS
  Four intracranial aneurysms cases were selected for this study. Using CT angiography images, the rapid prototyping process was completed using a PolyJet technology machine. The size and morphology of the prototypes were compared to brain digital subtraction arteriography of the same patients.
  
  
  RESULTS
  The biomodels reproduced the exact location and morphology of the intracranial aneurysms, particularly the necks, in life-size dimensions and exactly the same as measured by digital subtraction arteriography. The arterial segments adjacent to the aneurysm and arteries anatomically known by the surgeon were also shown, which could guide the surgeon to the aneurysmal segment. The models showed an average unit cost of US$ 130 and each one took an average of 20 hours to be fabricated.
  
  
  CONCLUSIONS
  It is possible to fabricate 3D physical biomodels of intracranial aneurysms from CT angiography images. These prototypes may be useful in the surgical planning for intracranial aneurysms to clarify the anatomy, define surgical techniques and facilitate the choice of suitable materials, such as clips and clip appliers.
authors: Bruna Olandoski
authors: BO
authors: Erbano
authors: Ana Cristina
authors: AC
authors: Opolski
authors: Marcia
authors: M
authors: Olandoski
authors: José Aguiomar
authors: JA
authors: Foggiatto
authors: Luiz Fernando
authors: LF
authors: Kubrusly
authors: Ulrich Andreas
authors: UA
authors: Dietz
authors: Cassio
authors: C
authors: Zini
authors: Melissa Mitsue Makita Arantes
authors: MM
authors: Marinho
authors: André Giacomelli
authors: AG
authors: Leal
authors: Ricardo
authors: R
authors: Ramina
mesh_terms: D002533:Cerebral Angiography; D002536:Cerebral Arteries / Q000473:pathology; D017076:Computer-Aided Design; D006801:Humans; D021621:Imaging, Three-Dimensional; D002532:Intracranial Aneurysm / Q000601:surgery*; D008953:Models, Anatomic; D015203:Reproducibility of Results; D013997:Time Factors; D014656:Vascular Surgical Procedures / Q000379:methods*