Mon - November 19, 2007

Leopard Upgrade Woes...


Very bad Apple, very very bad... I just upgraded my laptop to Leopard (10.5) -- it trashed my filevault enabled home folder... this is really bad.

Here is how I recovered:

Booted from Firewire backup drive into 10.4.
Ran Prosoft's Data Rescue II on the sparseimage.
Copied everything to another machine.

Bad Apple, very very bad Apple. This is worse than any Microsoft screwup I've encountered.

Posted at 11:19 PM     Read More  

Fri - October 6, 2006

Dynesys animation


Dynamic stabilization (dynesys) is an excellent alternative to rigid fusiion surgery.
Dynesys.swf

Posted at 11:19 PM     Read More  

Sun - July 23, 2006

Danek Satellite, Fernstrom Ball


This animation demonstrates the biomechanics of the Fernstrom ball or Satellite sphere as a disc nucleus replacement (officially an interbody arthrodesis device). After a large disc herniation is removed, the cobalt chrome (Vitallium) sphere is inserted into the disc interspace restoring height lost as a result of the disc herniation. Essentially normal motion results similar to that of an artificial disc. Unlike total disc replacements such as the Depuy Charite, the Satellite sphere is placed via a minimally invasive laminectomy (posterior) approach and with only minimal pain.



These intraoperative photographs demonstrate insertion of the sphere through a microendoscopic approach.


We check an intraoperative x-ray to confirm excellent placement before finishing.


Posted at 07:05 AM     Read More  

Tue - May 30, 2006

Gamma Knife Central


Day after Memorial day in the "bunker" under Kettering Medical Center (Dayton Ohio). We are performing 4 Gamma Knife procedures today. Everything is smooth. It is good to get back into the Gamma Knife routine. I have been concentrating on a bunch of new advanced spine procedures recently. Thursday we are going to place the first two Fernstrom balls. I am one of only five surgeons in the country doing this procedure. This procedure is a "motion sparing" type of lumbar fusion. That sounds like a bit of an oxymoron, except that this is how the device is classified by the FDA. The idea is to replace a removed nucleus pulposis (disc herniation) with a cobalt chrome sphere that restores the normal disc motion and preserves disc height. The original device, the Harmon sphere, made of vitallium, resulted in interbody fusions in some cases, hence the classification as a fusion device. Of course that was between 1959 and 1965. Nowadays we have a few new tricks up our sleeves ... watch this space.

Posted at 08:57 AM     Read More  

Sun - April 23, 2006

Too Many Wires


I've got lots of wires. I must have been somewhat of a spectacle at the airport. I was plugged into the wall for power, and I have a USB cable going to this new "audiophile" outboard DAC Bithead thingie with another cable going to my earphones which split into two and then wrap around my ears. The Shure E5s have nice bass. There are chords I haven't heard in years :-), and another firewire cable headed to an outboard drive. I am told that to get *great* sound, you need to rip your CDs into iTunes using error correction and the Apple Lossless codec. Then use an outboard USB DAC to get completely gitter and error free music -- this is what those untra expensive CD players and DACs will give you. Instead of buying a $2000 high end CD player, you get a $2000 laptop or for a real bargain a $700 Mac mini.

All this to watch a movie, or listen to music. Too many cables. Of course this is better than the alternative. Too few cables and you are SOL. It is amazing to me that I can edit a HDV video clip on a laptop in an airport -- while I am listening to music.

In any case this fellow sits down next to me stating "You must make Steve very happy". He pulls out a tiny Vaio. "This is the way to go." I smiled, I showed him FCP . No stinkin dinkie Vaio can do that :-) In all seriousness though I had a tiny Vaio notebook in the late 1990s and they are the slimest lightest thing going. The issue is that the little keyboard and small screen make it hard to do real work for extended periods of time. And watching movies in HD is way better on a 15 inch screen. The 17 is too large to use comfortably on the airplane so the 15" MBP is perfect for me. Particularly if you are wearing shorts in the winter. Too many cables though.

Posted at 02:38 PM     Read More  

Sat - April 15, 2006

Panera good, Starbucks bad ...


I guess that the fact I am writing this in 2006 indicates that I haven't been a 'heavy' wifi user out of the home but I just found out ... after trying to use my laptop at a Starbucks ... that they expect us to *pay* for this privilege. Harumph. I've been shelling out $2 - $3 a day for the last decade or so on Starbucks coffee and they don't have the courtesy to give me wifi access. I turns out that the coffee at Panera bread really isn't all that bad and the wifi is free. Panera is getting more of my business and in exchange for the wifi they gave me today, they get this free plug (I am a pretty cheap date, but a good demographic :-)))

Panera locations near my office

Posted at 04:53 PM     Read More  

Sun - April 9, 2006

Windows on Mac


Loaded both the Parallels VM as well as boot camp on my shiny new Macbook (Pro). It is a bit disconcerting to run Windows XP on a Mac. I remember why I like OS X so much :-)) Actually both installs went smoothly. The trick to getting Airport to work with Parallells is to select en1. I am still trying to get the two virtual machines to connect to eachother over the network -- while preserving as much of each of the respective firewalls as I can. At the very least I can ping the VM so I am sure that it won't be too difficult to mount the VM drive using Windows Sharing.

Of course this type of activity is old hat in the computer world and for Virtual PC users but to have things work at usable speeds and on a laptop no less is really terrific. Bootcamp is a tad smoother than Parallels but I'm more inclined to use Parallels on a frequent basis unless there is some 3D graphics intensive program that only runs on Windows (I am not a huge gamer).

So what do I need Windows for?

Two things ... firstly, many of the hospitals have chosen the GE PACS ... an expensive system that allows us to view MRI and CT scans across the hospital network, and via a VPN on a browser ... the kicker is that GE in their infinite wisdom have implemented their browser based system such that Internet Explorer (on a PC) is required ... losers ... in any case I need to bring up IE for this application. The other being ...

At this point in time the USB based GPS devices (that have good software) require the PC.

Other than that I don't need Microsoft software for anything.

Having the two OSes side by side on the same machine really shows off how smooth OS X is. Oh and the battery lasts far longer under OS X. Little details like a camera that can sense ambient light levels and properly adjust the screen as well as the backlit keyboard make this laptop a joy to use. Oh and trying to color correct the monitor under Windows is arcane in comparison.

Posted at 09:34 PM     Read More  

Thu - April 6, 2006

I just received my Macbook Pro


I just received my new Macbook Pro 2.0 Ghz. It works great. I doesn't make a funny sound. It is a bit warm, but not noticeably different than other laptops I've owned. I assume it is a revision D board because it is in the W8614 serial number series.

I ordered a custom configuration from the Apple website last Sunday -- free shipping. On Monday I received an email that the order was received and being processed. On Tuesday I received an email that the order was being shipped with a Fedex tracking number. It was being shipped from Shanghai CN. By Tuesday evening it had arrived in Anchorage AZ. Before going to work Wednesday I checked the tracking again ... the package had gone from Alaska to Indianapolis IN, and by (apparently) overnight truck to Loveland OH. By 10:30 AM it had arrived !!!

I popped it open and it worked. Apple is really doing something right.

Posted at 10:40 PM     Read More  


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