Varian’s Proton Therapy System, A Cancer Zipping Cyclotron


Ernest Lawrence, a Berkeley inventor of the cyclotron, would love to hear this story. His invention has not only enriched uranium for The Bomb, but will now be used for clinical applications.

Varian Medical Systems out of Palo Alto, California just received the European CE Mark of approval for the company’s Proton Therapy System. Maybe the largest and most expensive medical device, the 250 mega-electron volt proton accelerator requires its own building. The advantage, of course, is the ability to precisely target tumors, as protons have a much shorter and predictable range of energy delivery than photons.

From Varian, here are the components you’ll be getting in the package:

Proton accelerator: 250 MeV Superconducting CyclotronThe latest 250 MeV (Mega-electron-Volt) Superconducting Cyclotron is a key component of Varian proton therapy delivery. Stable beam current and beam intensity modulation allow precision spot scanning and three-dimensional proton dose distribution for unprecedented precision.

Improved manufacturing techniques mean that the lightweight, compact size helps reduce the total cost of ownership. In addition, superconducting magnet coils result in high extraction efficiency, low energy consumption, excellent reliability, and an overall reduction in operating costs and maintenance.

Unlike some other accelerators, the superconducting cyclotron, behaves in a very linear and predictable manner. This allows for complete automation and eliminates the need for routine operators.


protontop2.jpg Beam transport system

The proton accelerator is connected to one or multiple treatment rooms by the beam transport system (BTS). The BTS is segmented so that additional treatment rooms can be added to the system later, providing scalability to treat more patients as the clinic grows.

A key element of the BTS is the energy selection system (ESS). The ESS transforms the energy of the beam that the cyclotron produces from 250 MeV particles to the desired treatment energy between 250 MeV and 70 MeV. This translates to a possible range of range of 36.5–4.0 cm in water. Range shifters directly in front of the patient can be used to reduce the range to under 4.0 cm.

The ESS is used to set and verify the beam energy and spread to guarantee optimal treatment precision. The ESS is located close to the particle accelerator and outside the treatment rooms. This eliminates neutron production in the treatment room.

The BTS consists of a beam tube under vacuum and with a variety of magnets. Quadruple magnets are used to focus the proton beam and dipole magnets are used to deflect the beam to the selected treatment room. The magnets of the BTS system are tuned automatically by the control system to accommodate the selected treatment room, energy, and size of the beam.


Treatment Rooms

Varian’s proton therapy delivery system is modular and the number of treatment rooms scalable. It is possible to start with a single-room system that can be expanded to a multi-room facility later. Two types of treatment rooms are available, which can be combined in any desired ratio to match patient demand.

Gantry beam rooms are similar to the Varian® Clinac® and Trilogy™ gantries in which the beam can be fully rotated around the isocenter point. The proton gantry in combination with the treatment table offers the flexibility to select any desired beam angle for optimal beam delivery.

Fixed beam rooms offer a horizontal beam that can be optimized for eye, head, and neck treatments or be combined with a versatile treatment table for a variety of dedicated treatments.

protontop3.jpg Gantry

A gantry is a steel structure that houses the final section of the BTS and the delivery “nozzle.” The gantry rotates around the patient, delivering the beam at the desired angle. The combination of a gantry and treatment table offers the flexibility to treat patients from all angles. The unique mechanical design of the Varian gantry—two large roller bearings for support, balanced with counterweights—provides exceptional mechanical rigidity. The operator can select an angular position with a precision of ± 0.1°.

The Varian proton gantry can be equipped with one of two types of beam delivery systems, also called “nozzles.” The nozzle is equipped with motion sensors to help ensure patient safety. Alerts sound if these sensors detect if the gantry nozzle and patient come too close and the motion of the gantry and the table is slowed down. Additional contact sensors are hard-wired to emergency brakes.

 Standard table

The treatment table support is located in front of the gantry as an integral part of the gantry enclosure. The treatment table, nozzle contour, and diagnostic equipment positioned close to the patient are optimized to achieve a 4-π treatment-angle range as far as possible. All patient tables are equipped with six numerically controlled axes, and bending due to patient weight will be automatically detected and corrected.





i read through this couple of times. pretty interesting. hope our hospitals would have this as well. with this development seems like cancer can now be cured. tumors can go away.. im not a medic guy. dont know much on these, only that cancer kills.i like the invention part here..

article from  MedGadget

“God of War III” – Myth Becomes Reality This Year

God of War III — the last installment of the multi-million unit franchise exclusively on the Playstation 3 — is coming ever-closer to its epic release in the latter-half of 2009. The game’s depth of scale that is four times larger than its predecessor on the Playstation 2, God of War II. Developed by Sony Computer Entertainment’s, Santa Monica Studios, God of War III will bring epic battles to life with stunning graphics and an elaborate plot that puts Kratos at the center of the carnage and destruction as he seeks revenge against the Gods who have betrayed him.

“We have large shoes to fill following the success of the previously released God of War titles,” said Stig Asmussen, Game Director for God of War III. “But with refined gameplay and jaw-dropping visuals, I guarantee that God of War will give fans what they have been eagerly waiting for, and much more.”

Set in the realm of Greek mythology, God of War III is a single-player game that allows players to take on the climatic role of the ex-Spartan warrior, Kratos, as he treads through the intimidating heights of Mt. Olympus and the dark depths of Hell once more to seek revenge on those who have betrayed him. Armed with double-chained blades, Kratos must take on mythology’s darkest creatures while solving intricate puzzles throughout his merciless quest to destroy Olympus. 

Utilizing a new game engine built from the ground up and state-of-the-art visual technologies, the development team behind God of War III have made significant strides in giving players the realistic feel of actually being on the battlegrounds. With texture resolutions being quadrupled since God of War II,God of War III will feature fluid, life-like characters, as well as dynamic lighting effects, a robust weapon system, and world-changing scenarios that will truly bring unmistakable realism to Kratos’ fateful quest. Players will have a chance to join battles on a grand scale with many more enemies on-screen and be able to interact with levels like never before.


Key Features

  • God of War III is the epic conclusion to the Greek mythological trilogy which will complete Kratos’ story that began in the original title for the PlayStation®2.
  • True to the series roots, the four pillars of gameplay – brutal combat, intricate puzzles, exploration of awe-inspiring worlds, and a compelling story – all return to make God of War III the ultimate experience. 
  • God of War III picks up exactly where the action of God of War II left off – Kratos must take his quest for vengeance to the very stronghold of the Zeus. As the Army of Olympus surges out to meet him in battle and the chaos of the Great War is reignited, Kratos must scale the summit of Mount Olympus on the back of the mighty Titan Gaia, leading his new colossal allies in an all out assault on the Olympians. 
  • The menacing creatures of Greek mythology in God of War III are not only targets of Kratos’ brutal destruction, but can now be manipulated against their will, as he uses them to cross chasms, inflict blind rage against enemies, reveal puzzles and secrets, and as tools of complete annihilation as he makes his way on a quest fueled by hate and vengeance. 
  • As Kratos continues on his path of revenge, he will uncover new deadly weapons like the Cestus, powerful metal gauntlets with devastating strength, and other brutal instruments of war that will allow him to learn ruthless new techniques such as grappling with enemies and launching explosive wall to ground attacks. 
  • Built from the ground up, the brand new engine that powers God of War III was designed for one main purpose – to achieve a level of scale never thought possible. Kratos can now carve through armies of enemies while navigating on the back of a ‘living level’ – a massive, moving, breathing Titan as tall as the Empire State building. 
  • The PS3 capabilities have allowed the developers to bring the world of God of War to life like never before. Battling in detailed and unique 3D worlds lit by hundreds of dynamic lights and featuring textures with quadruple the resolution, Kratos and his enemies now feature realistic muscle striations, detailed facial expressions, and new heightened levels of brutality and gore.

God of War III is rated “M for Mature” by the ESRB.


much awaited game for my Playstation 3. will i buy this? we’ll see..

article from NEWS10

Keep Your Phone Away From Your Groin For Better Battery Life

Woman and guys with belt-holsters had it right—it’s better to keep your phone away from your body.

The NYT quotes the editor of Battery University as saying cellphone batteries last longer if they’re kept cooler. Cooler, as in not at your body temperature. So, if you’re really running low on juice during the day, get a holster or a purse. Plus, you should probably keep your junk cool and away from your cellphone if you ever want to have kids either. It’s win/win.

There are other tips such as shoving a wet phone in rice, putting a car alarm fob up to your chin and freezing a broken hard drive we’ve seen before, but head on over if you need a refresher.


not sure if i can agree with this.. how much longer will it go? wouldn’t do it for just a couple of hours then.. this enhances the chance of the phone being stolen.. but anyhow this is a good suggestion. the idea is there.

Another great post from Gizmodo

2008 Award

* Best Day Award- Friday
* Best Memory Award – me and her through out the year
* Best Friend Award – all
* New Friend Award – astro pars engineers
* Best Enemy Award – all involved in invading iraq and palestine
* Song of The Year – Aku Bukan Untukmu by zaf n lah
* Movie of the year – Australia
* Male Singer of the year – Jason Mraz
* Female singer of the year – err…
* Duo/Band of the year – Jason Mraz n Colbie Callait
* Actor(s) of the year – Politicians
* Actress of the year – Nicole Kidman, Eja
* TV program of the year – Drew Carey Show, Prison Break
* DJ of the year – Fafau
* TV host of the year – Drew Carey and Aznil Hj Nawawi
* Scandal of the year – Abby –> Norman <– Memey
* Best Hang Out Spot – Asia Cafe SS15
* Best Cinema – TGV Pyramid
* Best Eating Place – Kerang goreng Sek6
* Best Bowling Spot – Mines
* Best Bookshop – Pay Less Bookstore Amcorp
* Best Shopping Spot – Lowyat Plaza, Digital Mall, Summit
* Best Karaoke Spot – err..
* Mostly Done Activity- Surfing
* Best Website –

this is kind of late.. but never mind. post this anyways..