docs: def _dset_info_afni(dset):
      ''' returns raw output from running ``3dinfo`` '''
      info = DsetInfo()
      try:
          raw_info = subprocess.check_output(['3dinfo','-verb',str(dset)],stderr=subprocess.STDOUT)
      except:
          return None
      if raw_info==None:
          return None
      # Subbrick info:
      sub_pattern = r'At sub-brick #(\d+) \'([^\']+)\' datum type is (\w+)(:\s+(.*)\s+to\s+(.*))?\n(.*statcode = (\w+);  statpar = (.*)|)'
      sub_info = re.findall(sub_pattern,raw_info)
      for brick in sub_info:
          brick_info = {
              'index': int(brick[0]),
              'label': brick[1],
              'datum': brick[2]
          }
          if brick[3]!='':
              brick_info.update({
                  'min': float(brick[4]),
                  'max': float(brick[5])
              })
          if brick[6]!='':
              brick_info.update({
                  'stat': brick[7],
                  'params': brick[8].split()
              })
          info.subbricks.append(brick_info)
      info.reps = len(info.subbricks)
      # Dimensions:
  
      orient = re.search('\[-orient ([A-Z]+)\]',raw_info)
      if orient:
          info.orient = orient.group(1)
      for axis in ['RL','AP','IS']:
          m = re.search(r'%s-to-%s extent:\s+([0-9-.]+) \[.\] -to-\s+([0-9-.]+) \[.\] -step-\s+([0-9-.]+) mm \[\s*([0-9]+) voxels\]' % (axis[0],axis[1]),raw_info)
          if m:
              info.spatial_from.append(float(m.group(1)))
              info.spatial_to.append(float(m.group(2)))
              info.voxel_size.append(float(m.group(3)))
              info.voxel_dims.append(float(m.group(4)))
      if len(info.voxel_size)==3:
          info.voxel_volume = reduce(mul,info.voxel_size)
  
      slice_timing = re.findall('-time:[tz][tz] \d+ \d+ [0-9.]+ (.*?) ',raw_info)
      if len(slice_timing):
          info.slice_timing = slice_timing[0]
      TR = re.findall('Time step = ([0-9.]+)s',raw_info)
      if len(TR):
          info.TR = float(TR[0])
  
      # Other info..
      details_regex = {
          'identifier': r'Identifier Code:\s+(.*)',
          'filetype': r'Storage Mode:\s+(.*)',
          'space': r'Template Space:\s+(.*)'
      }
      for d in details_regex:
          m = re.search(details_regex[d],raw_info)
          if m:
              setattr(info,d,m.group(1))
  
      return info