some dcm files do not work

in chris/data:

cd data/VWFA_13_02-1691/2015.03.11-033Y-INVESTIGATORS_Kanwisher_Active-3003/

```
Mon Mar 23 04:23:36 2015 chris med2image.py[20777]: Converting DICOM image.
Mon Mar 23 04:23:36 2015 chris med2image.py[20777]: PatientName: VWFA_13_02
Mon Mar 23 04:23:36 2015 chris med2image.py[20777]: PatientAge: 033Y
Mon Mar 23 04:23:36 2015 chris med2image.py[20777]: PatientSex: M
Mon Mar 23 04:23:36 2015 chris med2image.py[20777]: PatientID: VWFA_13_02
Mon Mar 23 04:23:36 2015 chris med2image.py[20777]: SeriesDescription: DIFFUSION_HighRes_60dir_ColorFA
Mon Mar 23 04:23:36 2015 chris med2image.py[20777]: ProtocolName: DIFFUSION_HighRes_60dir
Mon Mar 23 04:23:36 2015 chris med2image.py[20777]: Converting middle slice in DICOM series: 32
Mon Mar 23 04:23:36 2015 chris med2image.py[20777]: Outputfile = ./0046-1.3.12.2.1107.5.2.32.35115.201503111041251465434043.jpg
Traceback (most recent call last):
File "/neuro/users/chris//arch/scripts/med2image.py", line 568, in
C_convert.run()
File "/neuro/users/chris//arch/scripts/med2image.py", line 263, in run
self.slice_save(str_outputFile)
File "/neuro/users/chris//arch/scripts/med2image.py", line 204, in slice_save
pylab.imsave(astr_outputFile, self._Mnp_2Dslice, cmap = cm.Greys_r)
File "/usr/lib/pymodules/python2.7/matplotlib/pyplot.py", line 2182, in imsave
return _imsave(*args, **kwargs)
File "/usr/lib/pymodules/python2.7/matplotlib/image.py", line 1302, in imsave
fig.savefig(fname, dpi=dpi, format=format, transparent=True)
File "/usr/lib/pymodules/python2.7/matplotlib/figure.py", line 1421, in savefig
self.canvas.print_figure(*args, **kwargs)
File "/usr/lib/pymodules/python2.7/matplotlib/backend_bases.py", line 2220, in print_figure
**kwargs)
File "/usr/lib/pymodules/python2.7/matplotlib/backend_bases.py", line 2008, in print_jpg
buf, size = agg.print_to_buffer()
File "/usr/lib/pymodules/python2.7/matplotlib/backends/backend_agg.py", line 524, in print_to_buffer
FigureCanvasAgg.draw(self)
File "/usr/lib/pymodules/python2.7/matplotlib/backends/backend_agg.py", line 451, in draw
self.figure.draw(self.renderer)
File "/usr/lib/pymodules/python2.7/matplotlib/artist.py", line 55, in draw_wrapper
draw(artist, renderer, *args, **kwargs)
File "/usr/lib/pymodules/python2.7/matplotlib/figure.py", line 1034, in draw
func(*args)
File "/usr/lib/pymodules/python2.7/matplotlib/artist.py", line 55, in draw_wrapper
draw(artist, renderer, *args, **kwargs)
File "/usr/lib/pymodules/python2.7/matplotlib/image.py", line 1030, in draw
im = self.make_image(renderer.get_image_magnification())
File "/usr/lib/pymodules/python2.7/matplotlib/image.py", line 999, in make_image
x = self.to_rgba(self._A, bytes=True)
File "/usr/lib/pymodules/python2.7/matplotlib/cm.py", line 248, in to_rgba
raise ValueError("third dimension must be 3 or 4")
ValueError: third dimension must be 3 or 4
```

Start by reproducing the failure from the chris/data path using the affected DICOM series, then inspect med2image.py and its slice_save method around the pylab.imsave call. Done means the series converts without the reported ValueError and produces the expected JPEG output.

Written by the indexing model from the issue text.